37results about How to "Effective outflow" patented technology

The invention discloses a granulation production line for composite material machining. The granulation production line for composite material machining comprises a mixing module for mixing materials, a kneader module for kneading the mixed materials, and a granulator module for granulating the kneaded materials; a mixing discharge port of the mixing module is connected to a kneader feed port of the kneader module through a pumping pipeline; a feeding pump is mounted on the pumping pipeline; a kneader discharge port of the kneader module is connected to a granulator feed port of the granulator module through a blanking pipeline; the mixing module includes a first feed port and a second feed port; a first weighing machine and a second weighing machine are respectively arranged on the first feed port and the second feed port; a first batching tank and a second batching tank are respectively connected to the first feed port and the second feed port through feeding pipelines; and a feed port weighing machine is arranged on the kneader feed port of the kneader module.

There are provided a fluid injection nozzle, a fluid mixer, a microbubble generating apparatus, a vapor phase generating apparatus, a method of producing swirling flow, and a swirling flow producing apparatus that can be applied to any kind of fluid and can efficiently generate a swirling flow at high speed. The swirling flow producing apparatus includes a housing and a cylindrical member. The housing includes a cylindrical portion of which at least one end is opened, and a fluid introducing passage that is opened on an inner peripheral surface of the cylindrical portion. The cylindrical member is provided in the cylindrical portion of the housing. The cylindrical member includes a cylindrical portion of which at least one end in a direction corresponding to an opening direction of the cylindrical portion is opened, and holes formed in a peripheral wall of the cylindrical portion. A fluid introduced from the fluid introducing passage flows into the cylindrical portion of the cylindrical member through the holes so as to generate a swirling flow, and flows out from the housing and the cylindrical member.

The invention provides cooking equipment and a control method thereof. The control method comprises the steps of judging whether foods reach a boiling temperature or not; if yes, opening a steam valve, wherein the opening area of the steam valve reaches a first state; after continuously heating for first preset time, judging that whether a water ratio is more than a first preset value or not; if yes, expanding the opening area of the steam value to a second state; and if no, reducing the opening area of the steam valve to a third state. Due to such a design, the opening area of the steam valveis automatically adjusted according to the detected temperature, the water ratio and working time; quick dissipation of heat and quick escape of vapor are avoided while generation and overflowing ofbubbles are avoided, the contradictory relation between the opening area of the steam valve and heating power is solved, and heating efficiency and user experience are improved.

The invention discloses a preparation method of a pyracantha fortuneana fruit extract. The preparation method comprises the following steps of: (1) enzymolysis: taking pyracantha fortuneana fruits, and adding a compound enzyme for enzymolysis to obtain an enzymolysis mixture; (2) alcohol extraction: adding ethanol into the enzymolysis mixture for carrying out extraction, and carrying out filtering and concentrating to obtain an ethanol extract; (3) macroporous adsorption resin purification: loading the ethanol extract on macroporous adsorption resin for purification, and collecting a desorption solution; and (4) drying: concentrating and drying a decomposition and precipitation solution to obtain the product. The preparation method has the advantages that flavone in the pyracantha fortuneana fruit can be effectively extracted, industrial production can be easily realized, and the pyracantha fortuneana fruit extract with the effects of resisting oxidation, brightening and whitening is obtained.

The present invention provides a heating eye treatment device comprising a front treatment mechanism, a connecting belt, two side treatment mechanisms and a power line. Two ends of the front treatmentmechanism are connected to the side treatment mechanisms. Two ends of the connecting belt are connected to the two side treatment mechanisms. The front treatment mechanism and the side treatment mechanisms are connected to the power line through a line. The front treatment mechanism comprises an inner shell, an outer shell, a plurality of fixing buckles and two treatment units. The two treatmentunits are located inside the inner shell and the outer shell, and the inner shell and the outer shell are connected through the fixing buckles. The heating eye treatment device of the invention is provided with a treatment bag, a vibration ring, massage protrusions and a heater, by heating the treatment bag, the effect of traditional Chinese medicine components in the treatment bag on eyes is accelerated, at the same time, acupuncture points are massaged by vibration, and the therapeutic effect of the device is improved.

The invention relates to a slag-forming constituent in casting lead and lead-base alloy, which comprises 35-70wt% of CaF2, 3-5wt% of Na3AlF6, 3-8wt% of KCl, 8-10wt% of NaCl, 2-5wt% of ZnCl2, 20-50wt% of C powder and 3-5wt% of NH4Cl. The invention makes use of the principle that inorganic salt can improve interfacial force and boundary tension between lead fondant and oxidate so as to de-slag in casting and using of lead-base product, improve quality of casting and using, ensure slag to carry on powder, and recovery metal efficiently. The invention the properties of simple preparation, low input of apparatus and capital and extensive usages such as lead ingot casting, lead-base alloy product casting and lead-base product later usage.

The invention relates to a slagging agent for melting and casting of lead and lead-based alloys. Its composition and weight percentage are: CaF245%~70%, Na3AlF63%~4%, KCl 3%~5%, NaCl 8%~10%, ZnCl22%~3%, C powder 12%~35%, NH4Cl 2 %; The present invention utilizes some inorganic salts to improve the surface tension and interfacial tension principle between the lead melt and the oxide, and adopts a reasonable proportion to make lead ingots and lead-based alloys fully Slag removal and purification can improve the quality of smelting and use, and ensure that the slag body is powdery after salvaging slag, with very little metal entrainment, and the entrained metal can flow out effectively, further recovering metal, and at the same time ensuring good environmental protection and safety. The preparation of the invention is simple, and the input equipment and capital are less. It can be used for melting and casting of lead ingots, melting and casting of lead-based alloy products and later use of lead-based products.

The invention relates to a high-coverage-rate adjustable limestone feeding device for a sewage treatment device. The high-coverage adjustable limestone feeding device comprises a device body and an air blower connection pipeline, wherein the lower end of the device body is connected with a base; fixing columns are arranged on both sides of the upper end of the device body; the air blower connection pipeline is fixed to the left side of the lower end of the device; the right side of the air blower connection pipeline is provided with a connection pipeline; limiting blocks pass through the middle parts of the inner sides of the fixing columns; a storage tank is embedded into the right ends of the limiting blocks. By adopting the high-coverage adjustable limestone feeding device, the device body and the fixing columns are welded integrally, placed in a horizontal-vertical state, and made of a stainless steel material, so that the limestone feeding device has high rigidity, and is not prone to fracturing and collapsing in a using process. Meanwhile, the whole device is placed in the horizontal-vertical state, so that the whole device can run normally in the running process.

The invention relates to a gas-carbon co-production device, comprising a rack, and a hopper, a reaction device, a gas purifying device used for purifying gas output by the reaction device and a gas water treatment device used for removing water contained in the gas which are arranged on the rack according to a production line, wherein the reaction device comprises a furnace body, a fire grate arranged in the furnace body, an air blower arranged outside the furnace body, and a blower tube which is arranged under the fire grate and is communicated with the air blower; a feeding hole communicated with the hopper is formed in the upper end of the furnace body, and a slag hole is formed in the lower end of the furnace body; a gas outlet communicated with the gas purifying device is formed in the furnace body; the rack is provided with a crusher; a spiral conveyor used for conveying carbon residue discharged by the furnace body into the crusher is arranged on the rack and between the crusher and the slag hole; the gas water treatment device is connected with a gas conveying pipeline.

The invention provides a liquid crystal module with a waterproof function. The liquid crystal module comprises a front frame, a rubber frame, a colored filter substrate, an array substrate and a COF assembly. The first side of the rubber frame is parallel to the first side of the front frame, and the second side of the rubber frame is parallel to the second side of the front frame. The array substrate is arranged between the first side of the rubber frame and the colored filter substrate, and a control circuit is further arranged on the upper surface of the array substrate. One end of the COF assembly is coupled to the control circuit, the other end of the COF assembly is coupled to a printed circuit board, and a drive chip is packaged on the surface of the COF assembly. A first guide board is arranged on the second side of the rubber frame, a second guide board is arranged on the second side of the front frame, and cleaning liquid is guided out of the module through the first guide board and the second guide board. Compared with the prior art, the guide boards abut against the inner side and the outer side of the COF assembly to change the curvature of the liquid crystal module, and therefore the cleaning liquid is effectively guided to flow out of the module, and the situation that due to the fact that the cleaning liquid is left on the surface of the COF assembly, a metal wire is corroded is avoided.

The invention relates to the technical field of aquatic product processing, in particular to aquatic product airing equipment. The equipment comprises a base and four universal wheels and further comprises a controller, a rainproof mechanism, an airing mechanism and a drainage mechanism, the airing mechanism comprises an airing disc, a placing assembly, an angle adjusting assembly and two verticalplates, the rainproof mechanism comprises a driving assembly and two baffles, the drainage mechanism comprises an adjusting plate, two traction assemblies and two limiting assemblies, the two limiting assemblies are symmetrically arranged at the end, away from the vertical plates, of the adjusting plate, the airing disc is located between the adjusting plate and the two baffles, and the angle adjusting assembly and the driving assembly are electrically connected with the controller. The aquatic product airing equipment has good drainage effect and better insect expelling effect, and no pollution is caused. Meanwhile, the airing angle can be automatically adjusted according to the illumination intensity, water such as grease generated during airing can be discharged in time, and taking isconvenient after airing.

The invention discloses an offshore garbage recycling device for marine environment guarantee based on wave driving. The offshore garbage recycling device comprises a supporting shell, a guide rod, a movable cylinder, a negative pressure bin, an extrusion plate and a generator. A fixed steel frame is fixed to the outer side of the supporting shell through bolts, the negative pressure bin is arranged on the inner side of the movable cylinder, and a piston is arranged on the inner side of the negative pressure bin. A water pump and a storage battery are arranged at the bottom of the movable cylinder, a water conveying hose is connected to the outer side of the water pump, a rotating shaft is connected to the inner side of the bottom of the movable cylinder through a shaft, clamping teeth are connected to the side face of the rotating shaft through a shaft, and a transmission gear is arranged on the outer side of the guide rod. According to the offshore garbage recycling device for marine environment guarantee based on wave driving, seawater nearby the device can be driven to flow in a vortex mode under the driving effect of waves, so that floating garbage on the offshore shore can be automatically collected; and meanwhile, garbage packaging bags can be automatically punctured and extruded, and reduction storage of the garbage is achieved.

The invention discloses a teapot and aims to solve the technical problems of cleanness and sanitation in tea making and convenience in use. The teapot is provided with a pot body, a tea basket in thepot body and a pot cover on the pot body, a tea basket bracket is arranged on a pot opening of the pot body and the outer edge of the tea basket in a sleeving mode, the tea basket bracket is in interference fit with the inner side face of the pot opening of the pot body, and the tea basket bracket is in pivot connection with the pot cover. Compared with the prior art, the teapot has the advantagethat the tea basket is placed on the tea basket bracket; when the tea basket is placed, the tea basket is prevented from colliding with a glass kettle body; the glass is protected; the collision soundis reduced; the tea basket bracket is provided with a connecting lug pivoted with the pot cover; the pot cover can be flipped and fixed on the connecting lug of the tea basket bracket to cover the upper end of the tea basket, the teapot is simple and practical in structure, a steam quick-setting ring is arranged on the teapot cover to reduce the backflow of condensate water on the inner wall of the teapot cover when the pot cover is opened, tea leaves and tea water can effectively flow out, and the teapot is stable in structure, clean, sanitary and convenient to use.

The invention belongs to the technical field of fish tanks, and particularly relates to a barrel-type fish tank inner wall cleaning device. The device comprises a fixing barrel, a pull strip is arranged at the top of the fixing barrel, an air storage barrel is arranged at the bottom of the fixing barrel, placing frames are arranged at the two ends of the bottom of the fixing barrel, lifting discs are connected to the bottoms of the placing frames, and scraping plates are arranged on the surfaces of the lifting discs. Cleaning plates are arranged at the bottoms of the scraping plates, and a driving gear is arranged at the top end in the fixing barrel. When the inner wall of a fish tank is cleaned, the pull strip can be pulled, the pull strip can drive a driving barrel to rotate through gear teeth and a driving belt, the driving barrel can drive a gear tooth column to rotate through pull ropes at the two ends, when the gear tooth column rotates, linkage full rotation can be driven through gear teeth on the surface of the gear tooth column, and finally the scraping plates and the cleaning plates are driven to rotate, so that the interior of the fish tank can be cleaned, the inner wall of the fish tank can be comprehensively cleaned through the scraping plates and the cleaning plates, the area which cannot be reached by hands can be easily cleaned, and meanwhile the cleaning effect is accelerated.

The invention provides a full-automatic flower watering device for a balcony. The device comprises a transparent box outside the wall surface of the balcony and a trapezoidal placing frame placed in the table top, a water tank and a water and fertilizer box are fixedly arranged at the upper end of the trapezoidal placing frame, low-boiling-point evaporated liquor is filled in the transparent box, a first driving cylinder, a gas storage tank, a second driving cylinder and a water pumping cylinder are sequentially arranged in the trapezoidal placing frame from left to right, a first piston and a second piston are arranged in the water pumping cylinder, the water pumping cylinder communicates with a first water pipe, the water tank communicates with the water pumping cylinder through a second water pipe, the water tank communicates with a water conveying pipe, and an irrigation mechanism communicated with the water conveying pipe is arranged on the trapezoidal placing frame. The device can automatically control the watering frequency according to the external environment change, the watering process is carried out only at night, and normal growth of plants is guaranteed.

The invention discloses a method for improving heat dissipation of a lithium battery at high temperature, and relates to the technical field of battery BMS. The heat dissipation method includes a battery pack, the battery pack is arranged in a battery PACK module, a battery PACK fan is installed under the battery, a fixing frame is provided between the battery PACK fan and the battery, and the battery A battery PACK box is installed on the top of the battery pack, a fixing frame is arranged between the battery pack and the battery PACK box, and several through holes are provided on the upper surface of the battery PACK box, corresponding to the bottom of the through holes on the upper surface of the battery PACK box There are several PACK box flat openings and several PACK box convex openings, the fan blows air to the PACK box convex openings through the battery PACK box flat openings, and the air flows out from the through holes corresponding to the PACK box convex openings. When the air passes through the battery pack box, the pressure difference between the flat mouth of the pack box and the convex mouth of the pack box is created, so that the air inside the battery can be discharged quickly.

The invention discloses a comprehensive sterilization thermos cup and a method of using the same. The comprehensive sterilization thermos cup includes a cup body assembly, a paper mass assembly, a liquid application assembly, a drawer assembly and an atomization assembly. The bottom of the cup body assembly is provided with a place for drying The paper ball assembly for compressed paper balls, the liquid application assembly for injecting sterilizing liquid into the dried compressed paper balls, and the drawer assembly for holding the compressed paper balls to be used. The top of the cup body assembly is used for drinking water. The atomization component sterilized at the mouth, the paper mass component is arranged above the liquid application component, and the liquid application component is connected with the drawer component. The atomization and sterilization work of the present invention only needs to trigger the switch to perform atomization. The inner wall and outer wall of the main body are provided with a bactericidal coating, which can sterilize the beverage inside the thermos cup and the place that contacts the outer wall. The compressed paper mass is made of non-woven fabric. Material, the compressed paper mass is soaked by the sterilizing liquid and becomes a wet wipe, which is used for sterilizing treatment of the skin or the external environment.

The invention belongs to the technical field of coal coking wastewater application, and particularly discloses an efficient solid-liquid separation device. The device comprises a circular barrel, a conical discharging shell, a solid outlet, a feeding opening, a guide cylinder, a plurality of vertical partition plates, overflow teeth, a hopper, a solid settling pipe, an overflow opening, a liquid delivery opening and the like. The efficient solid-liquid separation device has the beneficial effects that the design structure is reasonable, high-efficiency separation of a solid-liquid mixture is realized, the solid-liquid ratio of the solid-liquid mixture at an outlet is greatly improved, when impurities influencing the product purity in a system are enriched, mother liquor can be effectively discharged, the mother liquor is prevented from carrying more products to enter a later stage for treatment, the recovery rate of the product is improved, and the treatment cost of the carnallite is reduced.

The invention relates to the field of grain processing, in particular to automatic stone removing equipment with a dustproof function for grain processing, which comprises a shell, a feed hopper is arranged on one side of the top of the shell, a vibrating screen component is arranged at the joint of the feed hopper and the shell, and an L-shaped partition plate is fixedly connected to one side of the inner bottom of the shell. And a fan is mounted on the L-shaped partition plate. Through the arrangement of the vibrating screen assembly and the vibration of the vibrating rod, on one hand, clotted rice in the rice can be scattered, and on the other hand, through the vibration of the vibrating rod, the condition that the rice is blocked in the feeding hopper can be effectively prevented, so that the rice can smoothly fall onto the screen plate from the feeding hopper. And through vibration of the sieve plate, dust particles or fine stone mortar which are smaller than the rice and contained in the rice can be effectively sieved.

The invention provides a toilet cleaning appliance container and a liquid drainage method. The container is hung on the edge of the inner side of a toilet bowl through a hook, the container is internally provided with a cavity, the cavity body of the cavity is used for placing toilet cleaning appliances, the upper part of the cavity is provided with a liquid inlet, the container further comprises a gap for discharging liquid and a first drainage piece, the first drainage piece is arranged on the outer surface of the container, and a water collecting hole is formed in the first drainage piece. The water collecting hole can gather flowing-out liquid and form liquid drops with the volume increasing continuously, when the volume of the liquid drops reaches a certain value, the liquid drops can drip under the action of gravity, and during dripping, the effective solution in the container can be driven to continuously flow out of the gap and flow downwards through the gravity of the liquid drops. The solution which is driven to flow out gathers in the water collecting hole again to form new liquid drops. Through the circulation, the effective solution in the cavity of the container can better flow out of the cavity through the gap and drop into the toilet bowl, the sufficient cleaning effect is achieved, and the dropping speed of the effective solution can be kept more balanced.

The invention relates to a positioning guide device for deep hole machining for steps. The positioning guide device comprises a plurality of step positioning guide members, wherein each step positioning guide member is composed of a guide barrel and a flange disc connected with the guide barrel, and one end of each guide barrel is rounded, and the other end of the guide barrel is connected with the corresponding flange disc; positioning convex rings are arranged on the two end parts of each guide barrel separately; the rounded corner of one end of each guide barrel clings to the conical surface of the end part of a step hole of the machined part of a workpiece; the positioning convex rings on each guide barrel are matched with the inner surface of the step hole of the machined part of theworkpiece; a plurality of through holes in each flange disc are in one-to-one correspondence with a plurality of process holes in the edge of the opening part of the step hole of the machined part ofthe workpiece, and are connected and fixed through thread fasteners; and the inner diameter of the guide barrel of each step positioning guide member is equal to the inner diameter of the next-stage step hole of the workpiece. The invention further provides a method for deep hole machining for steps. The positioning guide device and the method are capable of effectively realizing deep hole tool positioning, and ensuring that a cutting liquid and iron chippings can effectively flow out without scratch on the surfaces of inner holes.

The invention relates to the technical field of wine soaking tanks, and discloses a leakage-proof wine soaking tank which comprises a tank body with an opening in the upper end, a sealing cover and aliquid outlet component; the sealing cover is in threaded connection with an opening of the tank body, a liquid storage cavity is formed in the tank body, and the liquid outlet component is arranged at the right side of the tank body; the liquid outlet component comprises a liquid outlet part and a connecting part, the connecting part penetrates through the inner wall of the right side of the liquid storage cavity, a sliding channel is formed in the connecting part and the liquid outlet part in a communicated manner, and a limiting groove is formed in the left end of the connecting part and communicated with the sliding channel; a sliding column is connected into the sliding channel in a sliding fit manner, and a valve blade is elastically connected to the left end of the sliding column and located in the limiting groove; a guide sliding groove communicated with the sliding channel is formed in the upper side of the liquid outlet part; and a containing groove communicating with the sliding channel is formed in the lower side of the liquid outlet part, and a liquid outlet assembly is arranged in the containing groove. The problems that in the prior art, when wine is taken from a wine soaking tank, residues are likely to be mixed, leakage caused by aging of a wine outlet hole is likely to happen, and wine deterioration is caused are solved.

Before warmup of a fuel cell stack (1) is complete, a cooling water pressure of the fuel cell stack (1) is suppressed lower than the pressure used when the fuel cell system is run in the steady state. In this way, when the system is started from a low temperature state, water in a cathode (2) and anode (3) flows efficiently into the cooling water passage (9), and water clogging is prevented while maintaining a proper water balance in the fuel cell system.

The invention relates to the technical field of bubble wine tanks, and discloses a leak-proof type of bubble wine tank, comprising a tank body with an upper end opening, a sealing cover and a liquid outlet member; The liquid cavity, the liquid outlet member is arranged on the right side of the tank body; the liquid outlet member includes a liquid outlet part and a connecting part, the connecting part runs through the inner wall of the right side of the liquid storage cavity, the connecting part and the liquid outlet part communicate with a sliding channel, and the left end of the connecting part is provided with a sliding channel. A limit slot, the limit slot communicates with the sliding channel; a sliding column is slidably connected in the sliding channel, a valve leaf is elastically connected to the left end of the sliding column, and the valve leaf is located in the limit slot; the upper side of the liquid outlet is provided with a sliding channel that communicates with The lower side of the liquid outlet is provided with a storage groove which communicates with the sliding channel, and a liquid outlet component is arranged in the storage groove, which solves the problem that residues are easily mixed in the wine brewing tank in the prior art when the wine is taken, and the wine outlet is easy to Leaks due to aging, and problems that cause wine to deteriorate.

The invention discloses a transdermal treatment method for aged skin, and relates to the technical field of transdermal drug delivery. The invention discloses a transdermal treatment method for aged skin. The transdermal treatment method comprises the following steps: step 1, selecting a part for transdermal drug delivery; 2, square non-gauze with the proper size is selected according to the range of the skin; 3, round medical absorbent cotton is used for dipping the liquid medicine, and the round absorbent cotton is placed in the round hole of the anti-seepage device; 4, the skin subjected to transdermal drug delivery is disinfected and aired; step 5, smearing an accelerant on the skin subjected to transdermal administration; 6, the square non-woven fabric is attached to the skin subjected to transdermal drug delivery, and the spontaneous heating bag is attached to the outer face of the square non-woven fabric; step 7; and after a period of time, the square non-gauze is taken down. According to the transdermal treatment method for the aged skin, the functions of resisting allergy and promoting blood circulation to remove blood stasis of the human body can be improved by smearing the wormwood extracting solution, the transdermal drug delivery efficiency can be improved, and a certain protection effect on the aged skin is achieved.

The invention discloses foundation pit support equipment for geotechnical engineering, relates to the technical field of geotechnical engineering, and comprises a trolley, a bolt, a partition, a grouting mechanism and an adjustment mechanism, and a grout storage chamber is arranged inside the trolley . The present invention prevents the grout from flowing and diffusing on the bolt by setting a partition on the bolt, and can realize effective grouting for fault fissures of any size, greatly reducing the required grout consumption; The adjustment mechanism is set to realize the adjustment and rotation of the push rod at any angle from horizontal to vertical by the rotating seat, and the fluid mortar can effectively flow out from all the grouting holes, which improves the grouting efficiency and ensures that the anchor rod and the outer wall of the grouting hole The verticality between them avoids the consequences of bruising and edge collapse on the port part, and further ensures the reinforcement strength of the support; it can also realize the purpose that the rod can be kept parallel to the rock mass drilling under any construction environment, and is suitable for Stronger.

The invention discloses bird repelling equipment for power grid equipment. The bird repelling equipment structurally comprises an embedded connecting shaft, reflectors, connecting rods and blades; the embedded connecting shaft is embedded right above the connecting rods; the reflectors are embedded on the inner side end faces of the blades; the connecting rods are fixedly embedded right below the blades; and the blades are uniformly arranged on the outer side faces of the lower ends of the embedded connecting shafts. When the blades rotate, bulged layers, embedded into the gaps, of filling beads are extruded and pulled, so that rubber wrapping balls are driven to deform to fill the gaps between the end faces, the outer contours of arc blocks and semi-arc blocks are arc-shaped, and blown airflow can be effectively guided by the outer contours of the arc blocks and the semi-arc blocks to flow outwards.

The present invention provides a cooking device and its control method, wherein the control method includes: judging whether the food material has reached the boiling temperature; if so, opening the steam valve, and the opening area is opened to the first state; after continuing to heat for the first preset time, judging whether the water Whether the proportion is greater than the first preset value; if yes, expand the opening area of ​​the steam valve to the second state; if not, reduce the opening area of ​​the steam valve to the third state. This design automatically adjusts the opening area of ​​the steam valve according to the detected temperature, water proportion and working time. While avoiding the generation and overflow of air bubbles, it also avoids the rapid loss of heat and the rapid escape of water vapor, which solves the problem of the opening area of ​​the steam valve. The contradictory relationship with heating power improves heating efficiency and user experience.