33results about How to "Achieve leveling effect" patented technology

The invention relates to the field of badminton production equipment, and particularly relates to a feather positioning and trimming device for badminton production. The device comprises a device mainbody, a limiting plate is fixedly mounted at the upper end of the left side in the device main body, a shearing device is fixedly mounted at the upper end in the device main body, a shearing rotatingwheel is fixedly mounted in the shearing device, the baffle is arranged in an arc shape, the distance from the outer side of the shearing rotating wheel is gradually reduced from bottom to top, an extrusion plate can thus be continuously driven to drive the feathers to be in contact with the shearing block, therefore, the feathers are sheared by utilizing the shearing block; when the previous feather is sheared, the next feather also enters the shearing groove, multiple feathers can be sheared at one time, and the feather shearing efficiency is greatly improved; guide block which is arrangedin a right-angled triangle shape is fixedly installed on the outer side of the conveying belt, so that the efficiency of the feathers entering the shearing groove can be improved, meanwhile, the extrusion plate can be guided into the inner side of the baffle, and normal operation of the shearing rotating wheel is guaranteed.

The invention provides a long-life aluminum and alloy oil removing activating solution and application, and belongs to the technical field of metal surface treatment. The long-life aluminum and alloy oil removing activating solution is prepared from, by concentration, 25-70 g / L of sodium hydroxide, 5-8 g / L of an addition agent and the balance water. The accumulation amount of the sodium hydroxide in the solution is 140 g / L. Dynamic balance is achieved. The addition agent is prepared from, by concentration, 250-282 g / L of 1,2,5,6 sorbitol or 280-320 g / L of sodium gluconate, 3.5-4.5 g / L of ethylenediaminetetraacetic acid disodium, 4-15 g / L of sodium thiosulfate, 3.5-5.5 g / L of sodium hexametaphosphate, 1.5-3 g / L of sodium pyrophosphate, 1.5-3 g / L of nonylphenol polyoxyethylene ether, 1.5-3 g / L of fatty alcohol-polyoxyethylene ether 0-20, 1.5-3 g / L of sodium diethylhexyl sulfosuccinate, 0.5-1.5 g / L of 2-naphthalenesulfonic acid formaldehyde olymer sodium salt and 25 g / L of sodium hydroxide. The oil removing activating effect is remarkably improved, extruding and machining tool marks are eliminated, and the leveling effect is achieved. Alkali consumption is greatly reduced, and the service life of a bath solution is prolonged by 40-50 times. Production efficiency is improved by more than 25%-30%.

The invention relates to the laying field of building materials and discloses a stone laying and leveling installation system which comprises a plastic tape and a plastic seat, wherein the plastic tape comprises a tape body and a base arranged at the bottom of the tape body; the tape body penetrates out of a gap between adjacent stone; the base is retained under the stone, and the upper surface of the base is tightly attached with the bottom surfaces of the stone at both sides respectively; the plastic seat is arranged above the stone, and the bottom surface of the plastic seat is a plane; the centre shaft part of the plastic seat is provided with a through hole which is perpendicular to the bottom surface, and the tape body upwards penetrates out of the through hole; the tape body is clamped and upwards lifted by clamp pliers so that the plastic seat and the plastic tape are drawn; meanwhile, the plastic seat is compressed on the stone; and after two kinds of adjacent balancing stone are firmly connected, the plastic seat is removed after the plastic tape is snapped by the clamping pliers. The invention also relates to a laying method. The invention has low system cost and high practicability, improves the working efficiency and prevents pollution because of once laying.

The invention relates to the field of metering and weighing, and in particular relates to a truck scale pre-arching device and technology. The pre-arching device comprises a portal, a hydraulic arm and a force applying fixture, wherein the hydraulic arm is vertically fixed to the lower side of the portal and points to the ground, the force applying fixture is connected to the lower end of the hydraulic arm and installed to be longitudinally symmetrical to structural steel on the truck scale. The force applying fixture comprises a fixture body and a force applying plate, wherein the upper end of the fixture body is connected to the hydraulic arm, the force applying plate is arranged at the lower end of the fixture body and horizontally stretches towards the two sides of the fixture body to form a horizontal plate for applying force to the structural steel. The lower part of the fixture body is provided with an opening, and the shape of the opening is matched with the top structure of the structural steel; the force applying plate is arranged at the bottom of the fixture body and also arranged on the place which is directly contacted with the structural steel to apply force. According to the truck scale pre-arching device and technology, the surface of a weighing platform can be slightly protruded, thus overcoming the ponding problem of the weighing platform, increasing intensity of the weighing platform, and ensuring that the truck scale can be effectively and safely used for a longer time.

The invention relates to the technical field of road construction machines, in particular to a double-connecting-roller soft road foundation vibration leveling machine and aims at solving the technical problems that a rammer compactor cannot conduct stable compaction and cannot conveniently conduct continuous rolling. In order to solve the above technical problems, the double-connecting-roller soft road foundation vibration leveling machine is provided and comprises a convex precision box. A through ground connection groove is formed in the bottom of the convex precision box. Long grooves areformed in the positions, located on the two sides of the through ground connection groove, at the bottom of the convex precision box. A continuous transmission vibration leveling mechanism is arrangedin the convex precision box. The bottom of the continuous transmission vibration leveling mechanism penetrates through the through ground connection groove and extends to the position below the through ground connection groove. A multi-shaft-coupling cooperates with a main bevel rack wheel, a slave bevel rack wheel, main concave wheels, slave concave wheels, sub shaft couplings, arc-angle bent shafts, transmission bevel gears, coupling bevel gears, drive shaft couplings and transmission shaft couplings, compaction and leveling can act at the same time, and the effect that a foundation is compacted and leveled at the same time can be quickly achieved.

The invention aims to provide a soybean seeding machine. The soybean seeding machine comprises a machine frame, a channeling device and a rotary pushing device, and a ditching device and a seeding device are sequentially arranged on the machine frame from front to back. The channeling device is arranged on one transverse side of the machine frame and is used for ditching ditches among acres; the rotary pushing device is arranged between the ditching device and the seeding device and is used for flattening soil accumulated after the ditches are ditched towards the inner sides of the acres; the ditching device comprises a plurality of first ditching cutters which are transversely arranged and distributed and fixedly mounted on the machine frame; the seeding device comprises a plurality of seed boxes, a plurality of pressing wheels and a seed metering device, the number of the seed boxes and the number of the pressing wheels are the same as that of the first ditching cutters, and the pressing wheels are rotatably mounted on the machine frame. The ditching device further comprises a plurality of second ditching cutters fixedly mounted on the machine frame, the second ditching cutters are located between the pressing wheels and the first ditching cutters, the rotary pushing device comprises a rotating shaft rotationally mounted on the machine frame and a spiral plate fixedly mounted on the rotating shaft, and the rotating shaft is in transmission connection with a power device.

The invention relates to the technical field of prefabricated parts, and discloses an automatic overturning and transporting device for rectangular prefabricated parts. The automatic overturning and transporting device comprises a machine shell and a mold, a conveying rod is slidably connected to the interior of the machine shell, a first sliding block is slidably connected to the left side of theconveying rod, an overturning device is arranged on the right side of the first sliding block, a first long rod is rotatably connected into the overturning device, a first notch is formed in the first long rod, and a second sliding block is slidably connected to the position, in the first notch, of the interior of the first long rod. According to the automatic overturning and transporting devicefor the rectangular prefabricated parts, a third long rod enables the mold on a control rod to slide to the surface of a second long rod through a fourth long rod, when the mold slides to a first longrod, the first long rod drives a first stop block to slide in a second notch, so that a third sliding block drives the second long rod to rotate through a rack, and the mold is overturned on the first long rod through the rightward and leftward pushing force of the mold, so that the effect of automatic overturning is achieved.

The invention relates to the technical field of road construction machinery, in particular to a double-roller soft roadbed leveling machine and a use method thereof. According to the double-roller soft roadbed leveling machine and the use method thereof, the technical problem that a tamping machine cannot stably carry out tamping or continuously carry out flattening can be solved. The double-roller soft roadbed leveling machine comprises a convex precision box, wherein the bottom of the convex precision box is provided with a through grounding groove; long grooves are formed in the positions,on the two sides of the through grounding groove, of the bottom of the convex precision box; a continuous transmission leveling mechanism is arranged in the convex precision box; and the bottom of thecontinuous transmission leveling mechanism penetrates through the through grounding groove and extends below the through grounding groove. According to the double-roller soft roadbed leveling machineand the use method thereof, a multi-coupling shaft is matched with a main inclined surface rack wheel, an auxiliary inclined surface rack wheel, a main concave surface wheel, an auxiliary concave surface wheel, a sub-coupling shaft, an arc angle bending shaft, a transmission bevel gear, a coupling bevel gear, a driving coupling shaft and a transmission coupling shaft, so that the simultaneous operation of tamping and leveling is achieved, and the effect of tamping and leveling a foundation is quickly achieved.

The invention relates to the technical field of packaging, and discloses a leveling and feeding device for the packaging process. The leveling and feeding device for the packaging process comprises amachine shell, wherein a control rod is rotatably connected to the left side of the machine shell; an electromagnetic device is fixedly connected to the interior of the control rod; a first magnetic block is arranged at one end, away from the inner wall of the control rod, of the electromagnetic device; a movable rod is fixedly connected to the surface of the first magnetic block; a first slidingblock is rotatably connected to the end, away from the machine shell, of the control rod; and a first stop block is fixedly connected to the surface of the first sliding block. According to the leveling and feeding device for the packaging process, the movable rod drives the first sliding block to slide on the surface of a supporting rod, a connecting rod drives a pressing rod to rotate at the upper end of the supporting rod, the pressing rod extrudes the upper end of packaging paper, meanwhile, the control rod drives a first push rod to extrude the side face of the packaging paper through thesupporting rod, and the first stop block slides in a notch in the surface of the first push rod, so that the side surface of the packaging paper is extruded and leveled, and the effect of leveling the packaging paper is achieved.

The invention belongs to the technical field of livestock and poultry equipment and discloses a traveling feeding homogenizer which comprises a homogenizer component. The homogenizer component comprises a homogenizer frame matched with an outside crib and a homogenizer adjusting member, the homogenizer frame is composed of a plurality of steel strips, the homogenizer adjusting member is positionedon the inner side of the homogenizer frame, and two ends of the homogenizer adjusting member are connected with those of the homogenizer frame. The traveling feeding homogenizer can overcome the defect of nonuniform discharging caused by discharging of a traveling bucket and can maintain discharging thickness of the outside crib uniform, thereby enabling chickens to be identical in feed intake.

The invention provides a balance type steel structure, and relates to the technical field of steel structures, a calibration rolling groove is formed in the front wall of a structure main base, trigger assemblies are arranged at the positions, corresponding to the calibration rolling groove, of the left side and the right side of the structure main base, each trigger assembly comprises a gravity sensor, a button and a telescopic shaft, and the gravity sensors are installed in the structure main base in an embedded mode; the button is installed on the inner wall of the gravity sensor, the inner end of the button extends to the inner wall of the calibration rolling groove, and the telescopic shaft is located below the gravity sensor and is in transmission connection with the gravity sensor. A reserved groove is formed in the bottom face of the structure main base, traction springs are fixed to the left side and the right side of the inner top wall of the reserved groove, sleeve discs are fixed to the bottom ends of the traction springs, and auxiliary pipes are connected to the centers of the sleeve discs through threads, so that the leveling effect on the structure main base is achieved, and the structure main base is rapidly corrected to be balanced; and the structure main base and the building construction position are in a horizontal state during installation.

The invention provides a multi-pressure-head flexible composite leveling mechanism for a thin plate and a method for leveling a memory thin plate. The multi-pressure-head flexible composite leveling mechanism comprises a base; the first rack and the second rack are arranged on the two opposite sides of the upper surface of the base. The movable pressing block is arranged on the first rack; the at least one driving device is arranged on the first rack and is used for driving the movable pressing block to move; the first group of adjustable pressure heads are arranged on the movable pressure block; the second group of adjustable pressure heads are arranged on the second rack and right correspond to the first group of adjustable pressure heads, and the distance between the first group of adjustable pressure heads and the second group of adjustable pressure heads is in a complementary state. The memory sheet flattening device can well achieve the flattening effect on a memory sheet, eliminates internal stress in the memory sheet, can completely meet the requirements of different deformation amounts at different positions of the surface of the memory sheet on the flattening reverse deformation amount, and effectively improves the flattening efficiency and flattening effect on the memory sheet. The flattening efficiency is improved; the leveling device is particularly suitable for leveling the cobalt metal cathode plate surface above an electrolytic cell.

The invention relates to the technical field of textile, and discloses a static electricity removing device for textile production and processing. The static electricity removing device comprises a machine shell; supporting rods are fixedly connected to the two sides in the machine shell; pressing rods are rotatably connected to the interiors of the supporting rods; first long rods are arranged at the ends, away from the supporting rods, of the pressing rods; rotating rods are arranged at the upper parts of the first long rods; a first stop block is fixedly connected to the surface of each rotating rod; and a control rod is arranged at the end, away from the rotating rod, of each first stop block. According to the static electricity removing device for textile production and processing, a rotating wheel intermittently extrudes a first push rod through a first push block, so that the first push rod continuously extrudes a spring on the surface of a second push block, and meanwhile, the first push rod drives a third stop block to gradually move towards the two sides through a movable rod; and when the second push block loses the resisting force of the third stop block, the spring drives the second push block to slide and enables the second push block to extrude the liquid to be sprayed to the surface of the textile fabric from a spray head, so that the effect of removing static electricity is achieved.

The invention discloses a slurry blocking strip for silk-screen printing. The slurry blocking strip comprises a pair of vertical end faces, a horizontal bottom face and a slurry blocking face obliquely arranged over the bottom face, and the slurry blocking face is composed of a pair of inclined faces. When the slurry blocking strip is used in silk-screen printing, slurry can be distributed more uniformly, and the process precision, uniformity and stability of silk-screen printing can be improved.

The invention provides a long-life aluminum and alloy oil removing activating solution and application, and belongs to the technical field of metal surface treatment. The long-life aluminum and alloy oil removing activating solution is prepared from, by concentration, 25-70 g / L of sodium hydroxide, 5-8 g / L of an addition agent and the balance water. The accumulation amount of the sodium hydroxide in the solution is 140 g / L. Dynamic balance is achieved. The addition agent is prepared from, by concentration, 250-282 g / L of 1,2,5,6 sorbitol or 280-320 g / L of sodium gluconate, 3.5-4.5 g / L of ethylenediaminetetraacetic acid disodium, 4-15 g / L of sodium thiosulfate, 3.5-5.5 g / L of sodium hexametaphosphate, 1.5-3 g / L of sodium pyrophosphate, 1.5-3 g / L of nonylphenol polyoxyethylene ether, 1.5-3 g / L of fatty alcohol-polyoxyethylene ether 0-20, 1.5-3 g / L of sodium diethylhexyl sulfosuccinate, 0.5-1.5 g / L of 2-naphthalenesulfonic acid formaldehyde olymer sodium salt and 25 g / L of sodium hydroxide. The oil removing activating effect is remarkably improved, extruding and machining tool marks are eliminated, and the leveling effect is achieved. Alkali consumption is greatly reduced, and the service life of a bath solution is prolonged by 40-50 times. Production efficiency is improved by more than 25%-30%.

The invention relates to the technical field of land levelers, and discloses a land leveler for roadbed and pavement construction, the land leveler comprises a machine body and a scraper, the scraper is internally provided with a movable cavity, the bottom surface of the movable cavity is slidably sleeved with a movable rod, and the outer surface of the movable rod and the interior of the movable cavity are fixedly sleeved with a stop block; a spring is fixedly connected to the bottom face of the movable cavity and located on the outer side of the movable rod, a pressing plate is fixedly connected to the bottom of the movable rod, a sliding groove is formed in the position, located on the left side of the movable cavity, in the scraper, a telescopic rod is slidably connected into the sliding groove in a sleeved mode, and a tension spring is fixedly connected to the position, located on the outer side of the telescopic rod, in the sliding groove. According to the device, the scraper is continuously jacked to the telescopic rod on the surface through soil, so that the telescopic rod continuously reciprocates in the sliding groove to jack the movable rod and the pressing plate to move upwards, then potential energy of the spring and the gravity of the pressing plate are used for descending, the pressing plate is used for leveling the soil crossing the scraper, and the flatness of the soil is ensured.

The invention provides a cloth leveling device for removing oil stains, and relates to the technical field of clothes. The cloth leveling device for removing the oil stains comprises a machine body shell, an operation disc is fixedly installed in the machine body shell, a sliding block is slidably connected into a sliding groove, an electromagnet is fixedly installed in the sliding block, a pushing rod is movably connected into the sliding block, and teeth are fixedly installed at the outer side of the sliding block; and the outer side of the sliding block is engaged with a gear. The electromagnet in the device is powered on to generate magnetism to drive the sliding block to move in the sliding groove, a rotating wheel is made to rotate through cooperative use of the sliding block and thegear, a brush wheel is made to clean the oil stains on cloth through the action of centrifugal force, and the effect of cleaning the oil stains is achieved; and through cooperative use of the slidingblock and a moving rod, the cleaned cloth is leveled, wrinkles of the cloth are prevented, and the effect of improving the processing efficiency is achieved.

The invention discloses a paste retaining bar for screen printing, which comprises a pair of vertical end surfaces, a flat bottom surface and a paste blocking surface obliquely placed directly above the bottom surface; the paste blocking surface is composed of a pair of inclined surfaces. Using the slurry bar of the invention during screen printing can make the slurry more evenly distributed, and can improve the process precision, uniformity and stability of screen printing.

The invention relates to the technical field of hand oil, in particular to a high wear-resistant matte hand oil and a preparation method and an application method thereof. The hand oil comprises 15-20 parts of silicone resin, 5-10 parts of modified polyurethane resin, carbon dioxide 3-5 parts of silicon, 8-12 parts of blocked isocyanate, 0.5-1.5 parts of organosilicon feel agent, 0.18-0.4 part of auxiliary and 65-75 parts of diluent. The hand oil has the characteristics of high temperature and humidity resistance, scratch resistance and chemical resistance, and has good adhesion, wear resistance and flexibility.

The invention relates to the technical field of garment fabric production, and discloses a three-in-one fabric spreading machine for producing garment fabrics, comprising a frame, a workbench, a cutting mechanism and a fabric pulling mechanism. Structure, the workbench is installed on the upper surface of the bottom plate, the workbench includes a table top, the table top is fixedly connected to the upper surface of the bottom plate through the supporting legs, the top of the table top is fixedly connected with a conveyor belt, and the front and rear of the table top are fixedly connected. A lead screw is installed at the end. In the present invention, a cutting mechanism is provided, wherein the cutting machine cuts the cloth, and the second stepping motor drives the second lead screw to enable the cutting machine to move in translation, and cooperates with the electric push rod to make the cutting machine move up and down, so as to achieve the cutting effect of the cloth. The purpose is to drive the box body through the hydraulic push rod, so that the rubber pad at the bottom of the box body is in contact with the cloth, so that the cloth will not run around and ensure the effectiveness of the operation.

The invention discloses elevator equipment. The elevator equipment comprises a cage which is provided with a motor; the motor is connected with a drive gear through a transmission mechanism; the drive gear is meshed with a rack arranged in a well frame in a longitudinal direction; and a manual rotation shaft which is used for controlling the cage to lift is arranged on the cage and is connected with the drive gear through a clutch and the transmission mechanism. The elevator equipment has the advantages that 1) the elevator equipment is provided with the manual rotation shaft, so that during power failure of an elevator, the elevator is driven by rotating the manual rotation shaft to lift so as to achieve the leveling effect; the clutch is arranged between the manual rotation shaft and the drive gear, so that two mechanisms are driven in an electronic control or manual operation way to be separated to work, and the mutual influence is avoided; and 2) the manual rotation shat extends to the middle position of the cage through a reducing mechanism, so that a user can operate the elevator equipment conveniently, and labor is saved during operation.

The invention discloses a punching machine tool with the leveling function. The punching machine tool comprises a leveling machine head, a top box is fixedly arranged above the leveling machine head,electric telescopic air cylinders are fixed below the top box, a control case is arranged below the leveling machine head, an electric distribution box is fixed to the front wall of the control case,a starting button is arranged on one side of the upper wall of the electric distribution box, the other side of the starting button is provided with a stop button, and wheels are welded to the cornersof the bottom of the control case. According to the punching machine tool with the leveling function, an upper pressing plate moves up and down through stretching out and drawing back of the electrictelescopic air cylinders, a material between the upper pressing plate and a lower pressing plate is repeatedly extruded, and therefore the leveling effect is achieved; and the multiple electric telescopic air cylinders are arranged and fixed through the top box of a flat plate structure, and therefore consistency of up and down moving of the electric telescopic air cylinders is ensured, and the material surface leveling effect is better.

The invention provides a method for flattening the plates of ship, which comprises following steps: first, preparing a flat cement ground larger than the plates near the assemble position, and arranging the plates on it; then, rolling the plates with road roller along the soldering channel, while one time can reach the demand. The invention has the advantages that: 1, selecting the road roller to reach the same effect of correct rolling device, and better than the water flattening, which can reduce the cost as 6-10 million yuan; 2, the road roller can be moved to another place to avoid possessing area; 3, the road roller uses diesel oil as power, to reduce the oil consumption; 4, the road roller can be operated by one driver, while the rolling device need more people; 5, the maintenance of road roller is easier than the rolling device.

The invention relates to an auxiliary device, in particular to an auxiliary adding reinforcement device for making a reinforced concrete column. The technical problem to be solved by the present invention is how to design an auxiliary reinforcement adding device for the manufacture of reinforced concrete columns that is simple to operate, can improve work efficiency, and saves manpower. An auxiliary reinforcement adding device for the manufacture of reinforced concrete columns, comprising: a support seat, the top of which is connected with a fixing frame; a mold, which is connected to one side of the top of the support seat; The side; the blanking assembly, which is arranged on the fixed frame; the driving assembly, which is arranged on the support seat, and the driving assembly is connected with the blanking assembly in transmission. The present invention adds steel bars through the cooperative operation of the blanking assembly and the driving assembly, thereby achieving the effect of adding steel bars.

The invention discloses an anti-dislocation flattening financial management device for a financial management system, and relates to the field of financial management.The anti-dislocation flattening financial management device comprises a bottom plate, an extrusion frame is fixedly connected to the upper surface of the bottom plate, an air cylinder is fixedly connected to the middle of the upper surface of the extrusion frame, and the output end of the air cylinder penetrates through the upper surface of the extrusion frame; the bottom end of the output end of the air cylinder is fixedly connected with an extrusion plate. According to the device disclosed by the invention, through the cooperation of a transfer rod, a wedge-shaped sliding block, a first sliding rail, an extrusion rod, a compression sliding groove, a piston plate, an inflation groove, a sliding rod and a leveling plate, the wedge-shaped sliding block extrudes the extrusion rod by utilizing extrusion force generated by downward pressing of an extrusion plate; according to the flattening device for the paper vouchers, the sliding rod drives the flattening plate to stretch out towards the side close to the center of the bottom plate from four directions at the same time, so that the stacked paper vouchers can be positioned in the flattening process, the paper vouchers are ensured not to be misplaced when being flattened, and the flattening effect of the flattening device is improved.

The invention belongs to the technical field of cloth processing, particularly relates to the technical field of cloth processing, and particularly relates to a leveling mechanism based on a gluing machine, the leveling mechanism comprises a leveling box, the leveling box is internally provided with a mounting cavity, the leveling box is internally provided with a horizontally arranged conveying plate, and the conveying plate is provided with a first plate body and a second plate body which are staggered up and down; the first leveling roller is slidably arranged below the first plate body in the horizontal direction; the second leveling roller is slidably arranged above the second plate body in the horizontal direction; the leveling mechanism further comprises a first power device and a second power device. Aiming at some existing gluing machines, in order to avoid the situation that the glued cloth is uneven due to the fact that the cloth is wrinkled in the compounding process, a leveling mechanism is additionally arranged before the cloth is pressed, and the leveling effect is achieved through the leveling mechanism.

The invention provides a drilling machine for a continuous secant pile retaining wall of a foundation pit. The drilling machine comprises a power device and a drill pipe mechanism connected to the power device, wherein the drill pipe mechanism is used for forming a plurality of continuous pile holes communicated with each other in one time. The drill pipe mechanism includes a plurality of drill pipes and drills located on the lower portions of the drill pipes. Two adjacent drills are staggered in the horizontal direction and the longitudinal direction, and projections in the vertical directionhave a coinciding portion; and each drill pipe at least includes two coaxially-arranged straight rod sections and at least one bent section located between the two straight rod sections. The drillingmachine also includes a first device mounted at the position of the bent section. The first device is suitable for being driven by the bent section to perform circumferential motion when the drill pipe rotates, so that soil body portions on the inner wall of the continuous pile holes, which protrude towards the inner sides of the holes, are damaged in a manner of contact through the circumferential motion.