112results about How to "Solve the displacement" patented technology

The invention discloses a portable power construction grounding device, which comprises an insulated operating rod and a grounding head, wherein the grounding head is connected with the insulated operating rod by adopting a universal joint. The grounding head comprises a handle part connected with the insulated operating rod, a fixed bayonet extending transversely from the top of the handle part,and a movable bayonet formed relative to the fixed bayonet, wherein one end of the movable bayonet is glidingly arranged at the handle part; and the lower part of the movable bayonet is provided witha hydraulic actuator, the outer barrel of the hydraulic actuator is fixed with the handle part of the grounding head, a hydraulic rod is connected with the bottom of the movable bayonet, and a hydraulic oil pipe of the hydraulic actuator is connected to a hydraulic handle at the bottom of the insulated operating rod. The grounding head is connected with the insulated operating rod by adopting theuniversal joint, so random angle change of the grounding head can be realized; by using a hydraulic system, the problems of displacement and compaction failure caused by manual rotation or spring compaction are solved in the prior art; and the designed bayonets can tightly hold a lead and prevent the lead from sliding out.

A construction method for Y-shaped column and overhung great inclined beam features that the Y-shaped column and the overhung great inclined beam are segmented and each segment is constructed along with its connected floor slab, beam, column and other concrete structure by concreting at same time to integrate them as a whole to bear the axial pressure and horizontal push force generated by the dead weight of said great inclined beam. Its scaffold is the combination of multifunctional one and ordinary one.

A fractured clavicle fixing band comprises a back rest 1 rendered in contact with a back of a user along a backbone when used, a pair of shoulder belts 2 connected an end portion of the back rest, stretched as passed respectively from shoulders to axillae when used, and a chest front belt 3 for pulling and fastening, in front of a chest of the user, the pair of shoulder belts in a direction to narrow a distance therebetween, in which the front chest belt 3 is made of a nonflexible material. An orderly reset region of the user can be supported by the antagonistic action of a fastening force with the shoulder belt 2 and a fastening force with a chest belt 3.

The invention discloses a switchable built-in tracheal catheter and laryngeal mask combined breathing device. The device comprises a laryngeal mask, a tracheal catheter, and a sealing locking device arranged on the device; the front end of the tracheal catheter is inserted into a laryngeal mask catheter from the far end of the laryngeal mask catheter; the rear end of the tracheal catheter can be pushed to enable the tracheal catheter to freely slide into the laryngeal mask catheter. According to the device, the tracheal catheter and the laryngeal mask can be switched in different breathing modes; the built-in tracheal catheter breathing mode is used in patient operations such as operation for different body part, or fat patients, high blood pressure patients and diabetes patients so as to improve the reliability and safety of assistant breathing; the laryngeal mask breathing mode is switched when the patient wakes from general anesthesia, so that the probability of airway hypersensitive reaction such as bucking caused by the tracheal catheter breathing mode can be reduced; the complication caused by bucking in the waking period can be reduced by the mode of replacing drugs.

The invention discloses a casting method of a hundred-ton ductile cast iron template casting for a two-plate injection molding machine. The casting method comprises the steps of mold making, casting system making, sand mold making and molding by casting, thus obtaining the casting, wherein the reverse side of a mold installing surface is designed at the lower part of a casting position; an inner runner hole is formed on the reverse side of the mold installing surface; in the casting process, liquid iron enters lower horizontal runners via sprues, then enters type A filters via the lower horizontal runners and is subjected to inoculation and filtration purification treatment inside the type A filters; then the liquid iron which enters type B filters via upper horizontal runners and is subjected to purification and filtration again enters a casting mold cavity via the inner runner hole; the final strength of a sand mold is 1.3-1.4MPa, and the final strength of a sand core is 0.9-1.0MPa; the casting temperature is 1290-1310 DEG C, and the casting time is 85-100 seconds. The casting method has the advantages that the casting defects such as graphite degeneration, shrinkage cavity, shrinkage porosity, sand inclusion and the like are not easy to occur, thus improving mechanical properties.

The invention discloses a combined air breather both of a built-in tracheal catheter and a laryngeal mask combined air breather for general anesthesia, which is characterized by comprising a laryngeal mask catheter and the a built-in tracheal catheter, wherein the built-in tracheal catheter is built-in in the laryngeal mask catheter, and a sealed pulling device is arranged between the built-in tracheal catheter and the laryngeal mask catheter; the air bags of the a laryngeal mask are respectively arranged at one end of the laryngeal mask catheter, and the built-in tracheal catheter is provided with an air bag of the a tracheal catheter; and the air bags of the laryngeal mask and the air bag of the tracheal catheter; are respectively communicated with an inflation valve of the laryngeal mask and an inflation valve of the tracheal catheter. According to the invention, a way of combining the built-in tracheal catheter and the laryngeal mask is adopted to solve the problems that the laryngeal mask is displaced when the patients are in the different positions or the position is changed in the surgery; and a way of installing and changing a cannula at any time under the proper condition is adopted to reduce ventilation obstacle and prevent airway hypersensitive reaction, haemodynamic fluctuation and resulting complications caused by the cannula of the tracheal catheter in the process of general anesthesia tube drawing. The combined air breather both of the built-in tracheal catheter and the laryngeal mask combined air breather for the general anesthesia provided by the invention is simple in structure, convenient to operate and obvious in using effect.

The invention discloses an automatic rice seedling plate overlapping device. The automatic rice seedling plate overlapping device comprises a stand, and a seedling plate conveying mechanism, a seedling plate stacking mechanism and a leak-proof soil filling mechanism arranged on the stand, the seedling plate stacking mechanism is provided with turn fingers through pins, the turn fingers are capable of rotating around the pins and restoring automatically, the turn fingers ascend and descend through a seedling plate lifting cylinder, when ascending, the turn fingers can support the edge of a seedling plate to be overlapped conveyed through the seedling plate conveying mechanism so as to support the seedling plate to be overlapped, when descending, when the turn fingers touch the edge of the seedling plate to be overlapped conveyed through the seedling plate conveying mechanism again, the turn fingers can rotate towards the upside so as to successfully descend to the downside of the edge of the seedling plate to be overlapped, and then the turn fingers reset to support the seedling plate to be overlapped again; the leak-proof soil filling mechanism covers the uppermost seedling plates supported by the turn fingers through a cover plate thereof, and the leak-proof soil filling mechanism slides up and down along with the ascending and descending of the seedling plates so as to prevent seeds and soil in the seedling plates splashing down or moving in the plate overlapping process. The automatic rice seedling plate overlapping device is capable of automatically stacking seedling plates, reliable in work and high in efficiency.

The invention discloses military multifunctional textile fabric drying equipment. The military multifunctional textile fabric drying equipment comprises a base, a drying box is fixedly connected to the axis of the top of the base, and a through hole is formed in the surface of the drying box. A conveyor belt is arranged at the top of the base and located in the through hole. A heating box is fixedly connected to the left side of the top of the drying box, and a draught fan is fixedly connected to the right side of the top of the drying box. According to the military multifunctional textile fabric drying equipment, the effect of fabric conveying is achieved through arrangement of the conveyor belt, the effect of heat generation is achieved through the heating box, and the effect of heat transmitting is achieved through the draught fan; the effect of fabric drying is achieved through a spray nozzle, the effect of pressing plate supporting is achieved through a first fixing block, and theeffect of fabric fixing is achieved through a pressing plate; and through a first clamping block and a first clamping groove, the effect of pressing plate fixing is achieved, fabrics can be effectively fixed, the condition of fabric moving is not prone to occurring, and drying is facilitated.

A seed coating is proportionally prepared from hydroscopic resin, disintegrant, bentone, talc powder, biocolloid, adhesive and porous zeolite powder.

A multiple-freedom-degree floating electric connector with a self-calibration function comprises a plug (1) and a socket (2), and is characterized in that the socket (2) comprises the components as follows: a secondary positioning pin (11), an after-pin insulator (13), a Phi12 contact pin (14), a Phi6 contact pin (15), a before-pin insulator (16), a Phi3 contact pin (18) and a lug casing (19). According to the multiple-freedom-degree floating electric connector with the self-calibration function, the problems of unreliable electrical connection or electrical connection failures caused by multiple-freedom-degree changes such as displacement, torsion and the like produced by a battery in any direction or at any angle of an installation carrier can be solved; at the same time, damage caused by vibration and impact can be effectively eliminated; the electric connector has the characteristics that the electric connector can be connected and separated rapidly, the operation is convenient, the mechanical property is good, the electric connection is reliable, and the like; and the electric connector has larger economic and social values.

The invention provides an object displacement image detection system and method. An image processing unit is connected with a work image unit and a CCD image sensor, CCD camera lens are connected with the image processing unit via the CCD image sensor and transmits a real captured image to the image processing unit which processes image information and outputs processing results to a CPU; a peripheral device is connected with a signal input terminal of the CPU; an output terminal of the CPU is connected with a signal input device; a detection system determines a displacement path of an object, compares the displacement path with a displacement path of the object predetermined by a control program, calculates an actual displacement path of the object, and outputs an control command to correct the displacement path of the object. The object displacement image detection system and method smartly solve the deviation between actual displacement and predetermined displacement of the object, and promote running accuracy and stability of the object; furthermore the whole detection system has a simple structure and is convenient for usage; the detection method is convenient to perform and use.

The invention discloses a device, a system and a method for cursor control. The system for cursor control comprises the cursor control device and a cursor sensing device, wherein the cursor control device comprises two coils. The two coils transmit respectively a first signal and a second signal to the cursor sensing device so that the cursor sensing device can sense a first coordinate and a second coordinate and outputs corresponding control signals according to the distance between the first coordinate and the second coordinate. Therefore, the cursor control system can control operation mode of a cursor by using the size of the included angle formed by the cursor control device and the cursor sensing device. By means of the device, the system and the method for cursor control, the problems that a user needs to draw hard and a digital board and a digital pen are apt to be abraded when the user uses the known cursor control system to draw thick lines can be solved, and the problems that the known cursor control system only changes the included angle formed by the digital pen and the digital board and the cursor generates displacement can be solved.

The invention discloses a foldable solar energy movable power supply. The power supply comprises foldable units and an output interface, wherein, the foldable unit comprises solar cell components which are overlapped from the top to the bottom, a flexible binding material layer and a backplane; the solar cell components are connected through flexible cables; the foldable units are sealed and melted into a whole through the flexible binding material; and the output interface is connected with cathode and anode which are led from the flexible cables. The invention also discloses a method for manufacturing the power supply. The foldable solar energy movable power supply has light weight and convenient portability, and can be well folded. Compared with the prior art, the folding performance of the power supply is greatly improved. The manufacture method improves the method for feeding materials of the backplane. The hollow material feeding method solves the problem that when a small component is laminated, a polyvinyl fluoride composite film (TPT) and the component have relative displacement because of flowing of an EVA or PVB coating.

The invention discloses a routing tape machining method for a circuit board, and the method comprises the following steps: S1, setting the number of routing channels and a machining area on a to-be-machined circuit board according to machining requirements, and then dividing the routing channels into odd-numbered routing channels and even-number routing channels; S2, starting the routing machiningfrom the port of the first odd-numbered routing channel of the circuit board through employing corresponding mechanical equipment, directly jumping to the routing machining from the port of the second odd-numbered routing channel after the routing machining of the first odd-numbered routing channel,..., directly jump to the routing machining from the port of the N-th odd-numbered routing channelafter the routing machining of the (N-1)-th odd-numbered routing channel till the routing machining of all the odd-numbered routing channels is completed; S3, starting the routing machining of the even-number routing channels after the routing machining of the odd-number routing channels, and employing the same routing machining mode at step S2 for the routing machining of the even-number routingchannels till the routing machining of all the even-number routing channels is completed. The method can achieve the machining of the circuit board with the small face width and large thickness, solves a problem that there is displacement and size differences during the molding machining of a conventional circuit board, is high in precision of the size of the circuit board, is high in qualified rate, is convenient for production and operation, and is good in performances of products.

The invention discloses a tank type online defoaming machine and a defoaming process thereof. The tank type online defoaming machine comprises a material loading mechanical arm, a material pick-up anddischarging mechanical arm, defoaming tanks, pick-up and transport mechanisms and an unloading mechanical arm; two defoaming tanks are adopted; the two defoaming tanks are arranged side by side on amachine table; the material pick-up and discharging mechanical arm linearly spans over the two defoaming tanks; two pick-up and transport mechanisms are adopted and are arranged before the defoaming tanks; the material loading mechanical arm is arranged at one side of the two defoaming tanks; and the unloading mechanical arm is arranged at the other side of the two defoaming tanks. According to the tank type online defoaming machine and the defoaming process thereof of the invention, a double-defoaming tank parallel design structure is adopted; the double-defoaming tank parallel design structure is adopted and can be effectively closely connected with an automatic production line of liquid crystal module sets; the two defoaming tanks can work alternately, so that the problem of the stagnation of the production line can be well solved; hot gas introduced into the tanks can be effectively, uniformly and rapidly centrifuged so as to be dissipated, and therefore, the problem of the displacement of a partial glass sheet can be solved, heat exchange efficiency in the tanks can be simultaneously improved, gas pressure increase speed in the tanks is increased, and defoaming time is effectively shortened.

The invention relates to a camera. The camera comprises a lens (1), a lens seat (2) assembled with the lens (1), a circuit board (3) and an image sensor (4) connected with the circuit board (3), and further comprises a steel plate (5). The circuit board (3) is supported on the steel plate (5) and is fixedly connected with the lens seat (2) through the first glue (6), or the steel plate (5) is fixedly connected with the lens seat (2) through the second glue (7), and the circuit board (3) and / or the image sensor (4) are / is fixedly connected with the steel plate (5). The camera provided by the invention has a good temperature drift compensation function.

A light-splitting device with one-dimension of movement is disposed on a casing. The light-splitting device includes a bearing element, a filter element and a power module. In this case, the bearing element is slidably disposed on the casing. The filter element is a color filter having a plurality of color sections. The filter element is disposed on the bearing element. The power module is connected to the bearing element. The power module drives the bearing element to move in one dimension.

The invention discloses an electric energy transmission aluminum piece which comprises an aluminum conductive device and an aluminum cable. The aluminum cable comprises an aluminum conductive core andan insulating layer coated on the surface of the aluminum conductive core; a section of exposed aluminum conductive core of which the insulating layer is stripped from the aluminum cable and the aluminum conductive core at least partially provided with the insulating layer are crimped in the aluminum conductive device; a transition section with a trapezoidal axial section is arranged at the jointof the insulating layer and the exposed aluminum conductive core in the aluminum conductive device; with the transition section as a demarcation point, the inner diameter of the end, connected with the insulating layer in a pressed mode, of the aluminum conductive device is larger than that of the end, connected with the aluminum conductive core in a pressed mode, of the aluminum conductive device; and at least one concave structure is arranged on the periphery of the aluminum conductive device. The invention further discloses a machining process of the electric energy transmission aluminum piece. The concave structure is arranged on the surface of the aluminum conductive device, so that the aluminum conductive device can be effectively prevented from moving relative to the clamp. The problem that the aluminum conductive device moves or rotates in the clamp during welding is solved, and the welding efficiency and the rate of finished products are improved.

The present invention discloses a kind of cushion, which includes one seat cushion and one back cushion connected together to form one integral arched structure or linear structure. Both the seat cushion and the back cushion are made of elastic material and have one fixing and locking mechanism in the joint part. The cushion can well close to the seat, and has simple reasonable structure and fast installation.

The invention discloses an oil separator hole drawing method and a hole drawing die processing method, and belongs to the field of hole drawing. The hole drawing method comprises the following steps that a drawing head located at the working position is aligned with an output shaft of a motor while the drawing head is fixed on a positioning device; then an oil separator is placed on a fixing die,and is clamped through a clamp die, and the motor is started to enable the front end of the output shaft of the motor to be connected with the drawing head; and then the motor is driven to move so asto drive the drawing head to carry out hole drawing and flanging operations on a to-be-machined hole in the oil separator, and thus the machined flange is uniform in wall thickness and consistent in height. The hole drawing die processing method comprises the steps of shape forming and heat treatment of the drawing head and the fixing die, and the manufactured hole drawing die is accurate in shape, good in wear resistance and long in service life.

The invention discloses an internal transmission furnace bottom assembly with a large gear ring, which comprises a furnace bottom case and an arch tray, wherein a chute is arranged between the furnace bottom case and the ash tray, rolling balls for supporting the ash tray to rotate relatively to the furnace bottom case are arranged in the chute, and the outer side of the chute is provided with the large gear ring fixed on the ash tray. The internal transmission furnace bottom assembly is characterized in that a chute cooling device used for reducing the temperature inside the chute is arranged under the ash tray. The internal transmission furnace bottom assembly disclosed by the invention has the advantages of reasonable design and simple structure, and the reformation can be carried out on the furnace bottom assembly of the existing coal gas generator, so the chute and the rolling balls arranged in the chute can work in a proper temperature range, the operation of dismounting and maintaining the furnace bottom assembly through machine halt is effectively avoided, the normal continuous proceeding of the production operation is ensured, and the production efficiency is sufficientlyimproved.

The invention relates to an induced draft fan steam-electric double drive system which comprises a steam turbine, a vortex permanent magnet device, an asynchronous motor and an induced draft fan sequentially and coaxially connected; the vortex permanent magnet device comprises a shell, a drive shaft, a load shaft, a clearance adjusting mechanism, a permanent magnet disc rotor component and a conductor disc rotor component; the two ends of the drive shaft are connected with a power output shaft of the steam turbine and the conductor disc rotor component separately; the two ends of the load shaft are connected with the permanent magnet disc rotor component and the asynchronous motor separately; and the clearance adjusting mechanism is connected with two permanent magnet disc rotors in the permanent magnet disc rotor component and drives the two permanent magnet disc rotors to move between an initial position and an adjusting position. The vortex induction between the permanent magnet disc rotor component and the conductor disc rotor component realizes synchronous rotation of the steam turbine, the asynchronous motor and the induced draft fan, and a traditional mechanical contact typeclutch is replaced, so that influence caused by the situation that a traditional shafting structural system is excessively long, the shafting displacement and vibration are large is avoided and system operation can be safer and more stable.

The invention provides an intelligent chessboard interaction device suitable for double-convex go chess pieces. The intelligent chessboard interaction device comprises a chessboard component (100), adetection component (300) and chess piece component(s) (400), the chessboard component (100) is arranged between the detection component (300) and the chess piece components (400); the number of the chess piece components (400) is one or more. The plurality of chess piece components (400) can be adsorbed on the upper surface of the chessboard component (100); each chess piece component (400) comprises a magnetic sheet component and a counterweight component (405). Each counterweight component (405) and each magnetic sheet part are arranged in each chess piece component (400); Each counterweight component(405) is arranged in the center of each chess piece component (400). Each magnetic sheet component is in contact with each counterweight component (405). Each magnetic sheet component includes one or more magnetic sheets. The invention can thoroughly solve the problem that chess pieces cannot fall or move due to magnetic repulsion between magnetic balls in the grooves of a chessboard matrix and the double-convex chess pieces on the surface of a chessboard.

The invention discloses a portable power construction grounding device, which comprises an insulated operating rod and a grounding head, wherein the grounding head is connected with the insulated operating rod by adopting a universal joint. The grounding head comprises a handle part connected with the insulated operating rod, a fixed bayonet extending transversely from the top of the handle part,and a movable bayonet formed relative to the fixed bayonet, wherein one end of the movable bayonet is glidingly arranged at the handle part; and the lower part of the movable bayonet is provided witha hydraulic actuator, the outer barrel of the hydraulic actuator is fixed with the handle part of the grounding head, a hydraulic rod is connected with the bottom of the movable bayonet, and a hydraulic oil pipe of the hydraulic actuator is connected to a hydraulic handle at the bottom of the insulated operating rod. The grounding head is connected with the insulated operating rod by adopting theuniversal joint, so random angle change of the grounding head can be realized; by using a hydraulic system, the problems of displacement and compaction failure caused by manual rotation or spring compaction are solved in the prior art; and the designed bayonets can tightly hold a lead and prevent the lead from sliding out.

The invention provides an electric power construction grounding device. A grounding end and an insulating operation rod are connected through a universal joint, any angle change of the grounding end can be realized, an operator is enabled to judge and adjust the angel of the grounding end in the usage process according to the positions of himself and an electric wire, and when the grounding end is adjusted to a suitable angle, the operation is completed just by tightening a screw, so that the operation in any direction is available; in addition, a hydraulic system is used, so that the problem of displacement or unavailable pressing caused by manual rotation or spring pressing in the prior art is solved. Furthermore, a groove is formed in a clamping surface of a bayonet, and a clamped sheet made of an elastic material is installed in the groove. In a usual force free case, the clamped sheet is in a flat state, and when the clamped sheet is hung on a line, the clamped sheet is tightly pressed with the effect of hydraulic pressing, a spring is pressed, and two ends of the clamped sheet go up and the middle part go down under the effects of the spring and the groove, so that a conductive wire is wrapped tightly, and the conductive wire is prevented from sliding out.

The invention discloses a wall tile construction method for preventing the displacement of facing tiles. The method comprises the steps of (1) preparing a facing tile, a special member and adhesives; (2) enabling the upper section of the special member to stretch out of the facing tile, and adhering the lower section of the special member to the back of the facing tile through the adhesives; (3) inlaying the facing tile on a wall base course; (4) anchoring the upper section of the special member on the wall base course through anchors, so that the facing tile is fixed on the wall outside and is prevented from displacing during subsequent wall tile construction, and the tiling construction is completed. The invention further discloses a high-safety wall tile construction method and a wall tile construction method for improving the adhesion power. Besides, the invention also discloses the special member for the construction method. According to the construction method, the problems of displacement of the facing tiles newly inlaid on the wall surface, the improvement of facing tile adhesion power and safety and reliability and the like are effectively solved, and the method can be widely applied to building construction and decoration projects.

The invention discloses a crucible sampling device, comprising a horizontal movement mechanism and a vertical movement mechanism, the top of the sampling rod (9) on the vertical movement mechanism is provided with a positioning device (21) for clamping the crucible (3) . In the present invention, a positioning device for clamping the crucible is arranged on the top of the sampling rod to position the crucible, the structure is extremely simple, and the displacement and drop of the crucible caused by factors such as shaking during movement are effectively solved. With similar positioning, the crucible is not affected by factors such as manufacturing tolerances. The crucible is not affected by other external forces, which prevents the damage and other influences caused by external forces on the crucible. It avoids the disadvantages of complicated mechanism and bulky size, reduces the difficulty and cost of design, further reduces the source of failure, reduces the failure rate, and improves the reliability and stability of the overall operation.

The invention belongs to an aircraft flight test field technology and particularly relates to a combined type fuel oil guide pipe connecting structure for an aircraft. The connecting structure is installed on a fuel oil system pipeline of the aircraft, reliable in pipeline connecting performance and easy and convenient to install. The combined type fuel oil guide pipe connecting structure comprises two pipe sleeves 1, two retaining rings 2, two nuts 3, an outer sleeve 4 and two sealing rings 5. An aircraft pipeline system is an important part for conveying fluid for the aircraft, a guide pipe connecting structure piece is an important standard piece for aircraft pipeline connection, and the using performance, the service life and the reliability of a fuel oil system, a hydraulic system, an environment control system and other systems of the aircraft are directly affected by the performance of the pipeline system connecting structure. Therefore, the pipeline connecting structure plays a vital role in the performance and the safe reliability of the aircraft.

The invention discloses a built-in endotracheal catheter laryngeal mask united ventilatory device for general anaesthesia, and belongs to the field of medical apparatuses. The built-in endotracheal catheter laryngeal mask united ventilatory device comprises an outer catheter, wherein a laryngeal mask sac is fixedly arranged on the catheter wall on one side of the outer catheter; the catheter end on one side of the outer catheter is fixed on the inner wall of a plane of the laryngeal mask sac; an air guiding pipe is fixedly arranged on the side wall of a curved surface of the laryngeal mask sac; an air sac is arranged at the end of the air guiding pipe; a one-way air inlet valve is fixedly arranged on the outer wall of the air sac; a control valve is fixedly arranged at one end close to theair sac, of the air guiding pipe; a rubber tightening hole is fixedly formed in the side wall of the plane of the laryngeal mask sac; a swivel sleeve is fixedly arranged at the catheter end on the other side of the outer catheter; and an endotracheal catheter and a phlegm eliminating catheter are arranged in an inner cavity of the outer catheter. According to the built-in endotracheal catheter laryngeal mask united ventilatory device disclosed by the invention, the situation that a great deal of phlegm can block support gas to enter the body of a patient is avoided, ventilatory disorder is reduced, and the ventilatory effect is improved; and besides, the endotracheal catheter or the phlegm eliminating catheter can be expanded and contracted into the laryngeal mask sac, so that the problemof laryngeal mask displacement generated when the patient is under different body positions or the body position is changed in the surgery is solved, and the practicality of the built-in endotrachealcatheter laryngeal mask united ventilatory device is improved.