90results about How to "Control length" patented technology

The invention provides a multi-path embedded video coding method and system based on generative artificial intelligence. The multi-path embedded video coding method comprises the following steps: firstly, coding input cue words and demand parameters, and outputting cue word vectors and demand parameter code streams; then decoding the cue word vector and the demand parameter code stream, and outputting a feature vector and a feature map; extracting the feature vector, the feature map and the representation guide vector to obtain multi-embedded feature information; reconstructing a picture by using the obtained multi-embedded feature information through a generative AI and obtaining a video to be iterated; performing video quality evaluation on the video to be iterated; and generating a binary code stream for transmission through the current cue word vector, the demand parameter code stream and the multi-embedded feature information input. According to the method, important information characteristics are transmitted in a highly abstracted manner, and a high-definition video is reconstructed at a receiving end, so that the storage space required by video coding and the size of a transmission information stream are greatly reduced, and higher-definition transmission under a narrower bandwidth is realized or video coding under an extremely low bandwidth becomes possible.

The invention provides a Kyber and SM3 fused post quantum cryptography encryption system, method and device. The control logic module controls the execution round number of SM3 in the Hash module according to the random number length required by the NTT module in different modes; the interception unit intercepts the effective length of each round of hash value; the filling unit fills the input message of each round of SM3; the Hash module determines the number of rounds required to be executed by the SM3 according to the lengths of the hash values required by different modes, and intercepts the effective length of each round of hash value; the NTT module is used for calculating polynomial multiplication in the Kyber algorithm; the NTT module comprises a butterfly unit and a control unit, the butterfly unit is used for calculation of modular addition, modular subtraction and modular reduction, and the control unit determines an operation mode of the NTT module; and the sampling module comprises a sampling rejection unit and a central binomial distribution sampling unit, the sampling rejection unit is used for sampling to obtain a public matrix, and the central binomial distribution sampling unit is used for sampling to obtain a noise vector. The scheme meets the safety standard of China and is reliable in safety.

The utility model relates to the technical field of infusion apparatuses, in particular to an infusion apparatus with a rolling structure, which comprises an infusion hose, a spiral tube portion and an upper limit ring tube, the spiral tube portion is arranged at one end of the inside of the infusion hose, and the upper limit ring tube is sleeved on the upper side of the outer wall of the spiral tube portion. The lower side of the outer wall of the spiral pipe part is sleeved with a lower limiting ring pipe, a limiting assembly is arranged on the inner side of the upper limiting ring pipe and comprises a connecting rod, a connecting plate part, a rubber connecting strip, an anti-disengaging head and a fixing connector, the connecting plate part is arranged at one end of the outer portion of the connecting rod, and the fixing connector is arranged at the other end of the outer portion of the connecting rod. A rubber connecting strip is inserted into the inner side of the connecting plate part; the problems that in the prior art, after an infusion apparatus is produced, the length of the infusion apparatus is determined, when the hanging height is not determined, an infusion hose of the infusion apparatus is long, space is easily occupied, hanging and pulling are likely to happen, and an infusion needle falls off are solved.

The invention provides a lens group, an optical system and electronic equipment. The lens group comprises a first lens group, a second lens group and a third lens group, and the first lens group comprises a first lens to a fourth lens; the second lens group comprises fifth to eighth lenses; the third lens group includes ninth to thirteenth lenses. 0.86 < = f5 / T45 < = 4.55; 2.65 < = F910 / (CT9 + CT10) < = 3.52; f11 / F1213 is larger than-2.75 and smaller than-1.50, f5 is the effective focal length of the fifth lens, T45 is the air interval between the fourth lens and the fifth lens on the optical axis, F910 is the combined focal length of the ninth lens and the tenth lens, CT9 is the center thickness of the ninth lens, CT10 is the center thickness of the tenth lens, f11 is the effective focal length of the eleventh lens, and F1213 is the combined focal length of the twelfth lens and the thirteenth lens. The lens group can obtain a high-quality telephoto imaging effect.

The present application relates to a terpene resin with controllable molecular weight and a preparation method thereof. A preparation method of a terpene resin with controllable molecular weight comprises: mixing β-pinene with ethylene glycol to obtain a mixture; mixing toluene and a catalyst at ‑5 to 5°C until uniform; dropping the mixture and keeping it warm at 5‑10°C for 1‑3h; removing the catalyst; desolventizing toluene and discharging the material, wherein the mass ratio of toluene to β-pinene is (1‑1.15): 1, the amount of the catalyst is 3.5‑5% of the mass of β-pinene, and the amount of ethylene glycol is 0.04‑0.07% of the mass of β-pinene. The present application can achieve precise control of the molecular weight of the terpene resin, prepare a terpene resin product with stable performance, and meet the high standard requirements of sanitary tape for viscosity, anti-aging and aviation electronic tape to enable it to perform accurately and stably in avionic electronic instruments, and broaden its application range in high-end applications such as medical, food, and aviation.

The utility model belongs to the technical field of aluminum bar cutting, and particularly relates to a distance-adjustable type continuous feeding aluminum bar cutting device which comprises an aluminum bar cutting device body, a feeding control assembly is installed on the top of the aluminum bar cutting device body, and the side of the feeding control assembly is connected with an aluminum bar cutting machine. A temperature controller is arranged on the other side of the aluminum bar cutting machine, a cutting length control assembly is installed at the bottom of the temperature controller, and an aluminum bar cutting and collecting assembly is connected to the bottom of the cutting length control assembly. The feeding control assembly comprises a motor, the top of the motor is rotationally connected with a worm, the outer wall of the worm is meshed with a turbine, and the side of the turbine is fixedly connected with a transmission rod; according to the aluminum bar cutting device, the situation that the cutting face of an aluminum bar is irregular or the cutting length deviates due to the fact that the aluminum bar shakes in the cutting process can be effectively avoided, meanwhile, the cutting length of the aluminum bar can be conveniently controlled, and the aluminum bar cutting device is more practical in the using process.

The invention relates to the technical field of welding, and particularly discloses a welding device for a swing support, the welding device comprises a base, a placing table, a placing frame and the swing support, the placing table is connected to the base, the placing frame is connected to the base, the swing support is connected to the placing frame, and a measuring assembly is used for measuring the thickness of a welding plate and fixing the welding plate. The length of the welding wire can be controlled in time after the thickness of the welding plate is measured according to the measuring assembly, the welding rod adjusting assembly is connected to the fixing frame and connected with the welding wire, the welding wire adjusting piece is used for adjusting the length of the welding wire, and the welding rod adjusting assembly can be started by measuring the thickness of the welding plate through the measuring assembly. The welding rod adjusting assembly can drive the welding wire to move, the situation that the welding effect is affected due to the fact that the welding plate is thick and the welding wire is short is avoided, and when the measuring assembly measures that the thickness of the welding plate is thin, the welding wire is moved to prevent the situation that the thin welding plate is welded through the welding wire, and too much melting is caused due to the too high temperature of a welding area.

The utility model relates to the technical field of beauty, and discloses a beauty needle head assembly which comprises a shell, the inner wall of the shell is fixedly connected with a transmitter and a limiting rod respectively, a liquid inlet is fixedly formed in the top of the shell, the inner wall of the shell is rotationally connected with a rotating sleeve, and the rotating sleeve is fixedly connected with the transmitter. The inner wall of the rotating sleeve is in threaded connection with a lifting sleeve, the inner wall of the lifting sleeve is in sliding connection with a fixed needle plate, the top of the fixed needle plate is fixedly provided with an infusion opening and a fixed plate, the inner wall of the fixed plate is fixedly provided with a spring, and the inner wall of the fixed plate is in sliding connection with a locking ball; and a fixed ball groove is formed in the inner wall of the conveyor. By rotating the rotating sleeve, a thread arranged in the rotating sleeve drives a thread at the top of the lifting sleeve to move upwards, the lifting sleeve moves towards the interior of the rotating sleeve in the direction of the limiting rod, the height of the exposed section of the steel needle set is continuously increased through the height of the lifting sleeve, and therefore the length of the steel needle set is controlled.

The invention discloses a feeding device for angle steel angle opening and closing equipment, and relates to the technical field of conveying equipment. Comprising a conveying rack, a plurality of evenly-distributed conveying wheels are arranged on the upper portion of one side of the conveying rack in the length direction of the conveying rack, a movable base is arranged on the upper portion of the other side of the conveying rack in a transmission mode in the length direction of the conveying rack, and a long material conveying component is arranged on the side, close to the front end of the conveying rack, of the upper portion of the movable base and is close to the conveying wheels. A short material conveying component is arranged on the side, away from the front end of the conveying material frame, of the upper portion of the moving base, and the short material conveying component is arranged on one side of the long material conveying component. The long material conveying component and the short material conveying component can stably push angle steel of different lengths into angle steel machining equipment, stable conveying of the angle steel of different lengths is achieved, the zero limiting component can effectively control the length of the angle steel entering the angle steel machining equipment, and then the angle steel machining precision is improved.

The utility model provides a kind of combined wall charger with wire drawing reel, comprising: wall charger body and wire drawing reel;Magnetic element is fixedly installed in one side inside wire drawing reel, and one side inside wall charger body is fixedly installed with ferrous component, and ferrous component is used to connect with magnetic element to limit the combination between wall charger body and wire drawing reel.The utility model provides a kind of combined wall charger with wire drawing reel, by the storage mode that magnetic element adsorbs wire drawing reel on the surface of wall charger body, wire drawing reel can orderly store charging wire, the length of charging wire is conveniently controlled by pulling mode, the winding of charging wire is avoided, and wire drawing reel can be adsorbed on the surface of wall charger body greatly improve its use convenience, without additional installation space, directly utilize wall charger surface, realize the close combination of charging and storage function, make charging area more neat and orderly, meet the double needs of user to electronic equipment charging convenience and space neatness.

The application discloses a nuclear power steam generator thermocouple wire and fixing piece bending device. The device clamps and fixes two ends of the fixing piece respectively, inserts the thermocouple wire into the fixing piece, and realizes S-shaped bending of the thermocouple wire and the fixing piece by pressing one end of the fixing piece. In the bending process, the bending slider and the lower clamping plate of the hot end realize smooth guiding to the fixing piece, so that no indentation is caused on the hot end thermocouple wire, and the internal thermal sensing wire of the thermocouple wire is not damaged. The bending size can be determined by measuring the distance of the bending slider extending out of the shell.

The utility model discloses film covering equipment, and relates to the technical field of film covering. The film laminating equipment comprises a rack, a film frame, a conveying device and a film laminating device, the film frame is installed on the top of the rack, the film laminating device is installed in the rack and located below the film frame, the conveying device is arranged on the rack and located below the film laminating device, the film frame is used for containing film materials, and the conveying device is used for conveying plates; the film covering device comprises a film collecting roller, a tensioning roller, a leveling roller, a film collecting mechanism, a first film pressing mechanism and a film cutting mechanism, the film collecting mechanism is transversely installed on the rack, the telescopic end of the film collecting mechanism is connected with the tensioning roller, and the film collecting mechanism is used for driving the tensioning roller to reciprocate in the length direction of the conveying device; when the laminating equipment disclosed by the utility model is used for laminating a plate, redundant film materials on the side edge of the laminated plate can be shorter, the subsequent work of the plate is facilitated, and the problem that the redundant film materials on the side edge of the plate are too long when the conventional laminating equipment is used for laminating is solved.

The utility model relates to the field of auxiliary devices, in particular to a newborn breathing auxiliary device. Comprising a base, and solves the problems that an auxiliary device in the prior art cannot conveniently wind an oxygen tube, a respirator and the oxygen tube are generally needed when breathing auxiliary treatment is carried out on a newborn, but the oxygen tube is generally long, so that the oxygen tube cannot be conveniently wound when the breathing auxiliary treatment is carried out on the newborn. An oxygen pipe is usually put on the body of a newborn, when the newborn moves, the oxygen pipe may be wound on the body of the newborn, so that the life health of the newborn is affected, meanwhile, the oxygen pipe is too long and can fall onto the ground, bacteria are easily adsorbed, and the work of medical staff is affected. And at the moment, the oxygen pipe needs to be wound, and meanwhile, the length of the oxygen pipe needs to be controlled, so that the oxygen pipe can carry out breathing auxiliary treatment on the newborn according to actual requirements.

The utility model discloses a sensor terminal and a sensor terminal injection mold structure, the sensor terminal comprises three connecting terminals which protrude out of a sensor shell and extend in parallel, the root part of each connecting terminal is provided with an arc-shaped bulge, one end, relatively far away from the root part, of each connecting terminal is an inner side end, and the other end of each connecting terminal is an outer side end. Limiting bosses are symmetrically arranged on the two sides, close to the inner side ends, of the connecting terminals in the extending direction, a short circuit prevention gap is formed between the limiting bosses on the adjacent connecting terminals, and a guide channel matched with a connector injection mold is formed between the adjacent connecting terminals. And the limiting boss is arranged on the connecting terminal so as to guide the connecting terminal when the connecting terminal is inserted into the connector injection mold, and the connector injection mold can abut against the limiting boss, so that injection molding calibration is completed. According to the sensor terminal and the sensor terminal injection mold structure, the injection molding length quality requirement of the sensor terminal can be met, and the plugging work efficiency is improved.

The utility model discloses an infusion tube digital display constant-temperature heater with an infrared alarm structure, which belongs to the technical field of medical instruments and comprises a shell, a cover plate is mounted at one end of the shell in a hinged manner, a heating bin is arranged in the shell along the length direction, and a guide mechanism for an infusion tube is arranged in the heating bin. An electric heating plate is arranged at the end of the heating bin, and a guide groove is vertically formed in the end, away from the hinged position of the cover plate, of the shell. The alarm mechanism composed of the infrared emitter, the receiver, the controller, the buzzer and the electric telescopic rod is arranged at the top end of the guide groove, when no liquid passes through the infusion tube, red light emitted by the infrared emitter penetrates through strong infrared rays of the empty infusion tube to be received by the receiver, and at the moment, the controller controls the buzzer to sound, so that the liquid in the infusion tube is warned. And in addition, starting of an electric telescopic rod is controlled, the infusion tube is extruded and blocked, continuous input of liquid is avoided, and the practicability of the device is improved.

The utility model provides a fosaprepitant intermediate trifluoromethyl acid ester device, and belongs to the technical field of medicine production. Comprising a reaction kettle body; the stirring part is positioned in the reaction kettle body and is used for stirring reaction materials in the reaction kettle body; the driving part is positioned on the reaction kettle body and is used for driving the stirring part to stir; the inhibiting part is positioned on the stirring part and is used for releasing an additive or an inhibitor into the reaction kettle body. Through the arrangement of the rotating rod and the storage barrel, when the shielding part closes the opening of the storage tank, the storage barrel is vertically arranged, an additive or an inhibitor is stored in the storage barrel, the electric push rod pushes the storage plate, so that the storage plate leaves the sliding chute, the shielding part is automatically opened, and a solution in the reaction kettle body passes through the storage tank; therefore, an additive or an inhibitor in the material storage barrel enters a solution, and useless by-products generated by the solution are reduced.

The utility model relates to a beancurd shoot forming device convenient to control length, which comprises an operation box, a long rack, a beancurd pool, a winding roller, a square box, a dryer, a drying forming box and a conveying platform, and is provided with a length control component, so that a worm can be rotated by a worker, and an elastic block can move forwards or backwards under the sliding fit of a first round rod and a limiting channel; the four annularly-arranged elastic blocks synchronously move, so that the size of a circular diameter opening formed by the inner sides of the elastic blocks can be controlled, then the fastening force of the movable body connected to the periphery of the penetrating rod in a sleeving mode is controlled, the position of the length control assembly is conveniently adjusted, and after the position is fixed, the bean sprout can be cut through the cutting knife, and the length of the bean sprout is controlled.

The utility model relates to the field of cast-in-situ bored pile construction, in particular to a cast-in-situ pile concrete surface detection device, which comprises a controller, a detection device, a detection device and a control device, the detection mechanism is arranged at the lower end of the controller and comprises a measurement assembly arranged at the lower end of the controller, a grounding assembly is arranged at the lower end of the measurement assembly and comprises a measurement seat arranged at the lower end of the measurement assembly, and an inner bin is formed in the lower end of the measurement seat; when a concrete layer is touched, a grounding probe can abut against a piston rod to move upwards in the inner bin, a circuit is switched on through a power supply touch switch, and a signal is transmitted into a controller through a signal line, so that an indicator lamp on the controller emits light to play a role in indication, and the detection precision is improved; the length of the concrete virtual pile is controlled; the problem that an existing detection device for the concrete surface of the cast-in-place pile cannot effectively measure the elevation of the top of the concrete pile, and consequently the measurement accuracy has a large error is solved.

The application relates to a method for controlling edge grain defect of oriented silicon steel, characterized in that the method comprises the following steps: coating a set amount of grain defect control slurry in a set range of the inner ring and / or the outer ring of the upper end face and / or the lower end face of an oriented silicon steel coil to reduce the edge grain defect occurrence rate of the oriented silicon steel; and covering the whole end face of the upper end of the steel coil with a metal cover plate on the upper end cover of the steel coil. The method coats the grain defect control slurry in a certain area of the upper and / or lower end face of the steel coil, so that the grain defect control slurry can increase the local interlayer oxidation of the strip steel at high temperature, and then increase the bottom layer reaction, so as to control the width and length of the edge grain defect.

The utility model relates to the technical field of steel wire rope installation and fastening, in particular to a connection tensioner, which is characterized by comprising at least one tensioning component, each tensioning component comprises a connecting piece, a tensioning sleeve and a crimping sleeve fixedly crimped with one end of a steel wire rope, and a tensioning cavity penetrating through two ends of the tensioning sleeve is arranged in the tensioning sleeve. The connecting piece is in threaded connection with one end of the tensioning sleeve, and the crimping sleeve is detachably arranged in the tensioning cavity in a sleeved mode and connected to the other end of the tensioning sleeve in a clamped mode. The whole structure and the size of the tensioning sleeve can be smaller, the number of parts can be reduced, reduction of the whole machining cost and the material cost is facilitated, and the compression joint portion of the compression joint sleeve and the steel wire rope can be well hidden in the tensioning sleeve.

The invention belongs to the field of chemical oil recovery in the petroleum industry, and specifically relates to an alkali-free betaine type oil recovery agent composition and a preparation method thereof, which comprises the following raw materials by weight: 55-65 parts of a novel betaine type surfactant, 35-45 parts of polyoxyethylene ether, and 20-30 parts of a solvent, wherein the novel betaine type surfactant has a structure in which three betaine side chains are connected to a benzene ring. The alkali-free betaine type oil recovery agent composition provided by the invention has excellent temperature resistance and salt resistance, and can effectively reduce oil-water interfacial tension to improve oil recovery efficiency.

The utility model belongs to the technical field of cutting machines, and particularly relates to an iron pole cutting machine which comprises an operation table, an installation frame mechanism is connected to the upper side of the operation table, a fixing frame mechanism is connected to the upper side of the operation table, the fixing frame mechanism is located on the rear side of the installation frame mechanism, and a cutting machine body is connected to the upper side of the operation table. The cutting machine body is located on the rear side of the fixing frame mechanism, a groove is formed in the upper side of the operation table in a penetrating mode, the groove is located on the rear side of the installation frame mechanism, a sliding way is installed on the inner side of the groove, and the upper side of the operation table is connected with the measuring mechanism which is located on the rear side of the groove. According to the device, the adjustable fixing frame mechanism is arranged, iron rods of different specifications can be fixedly cut, meanwhile, the measuring mechanism is arranged, the cutting length of the iron rods with the cutting precision requirement can be controlled, and therefore the cutting precision is improved.

The steel structure engineering support comprises a base mechanism, steel structure columns, connecting mechanisms, assembling mechanisms and fixing mechanisms, the steel structure columns are arranged at the upper end of the base mechanism, the connecting mechanisms are arranged between every two adjacent steel structure columns, the assembling mechanisms are arranged at the right ends of the connecting mechanisms, and the fixing mechanisms are arranged at the left ends of the assembling mechanisms. The steel structure column is convenient to disassemble, install, store and transport, meanwhile, the number of the installed steel structure columns can be selected according to actual conditions, the overall length of the steel structure columns is controlled, practical application is facilitated, and applicability is high.

The utility model relates to an electronic expansion valve connecting line material channel capable of accelerating draining based on wind power, which comprises a material channel, the material channel comprises two longitudinally opposite L-shaped side grooved rails, and the lower end faces of the side grooved rails are fixedly connected with stand columns; a water receiving tank is inserted between the side grooved rails, the lower end face of the water receiving tank is fixedly connected to a plurality of transverse supporting beams, and the two ends of each transverse supporting beam are fixedly connected to the stand columns respectively. Oblique air blowing structures are arranged on the two sides of the connecting line material channel, and on the basis that wind is blown to the outer surface of the electronic expansion valve, draining can be accelerated on the material channel with the moderate length; therefore, the length of the connecting line material channel can be controlled, and the situation that a large space is occupied due to the too long connecting line material channel is avoided.

The invention discloses a pair of wire cutters, which comprises a tip tube which is of a cylindrical structure and is internally provided with an accommodating space; the plain end part is arranged at one end of the tip pipe and is provided with an upward opening, so that a containing groove with an upward opening is formed in the plain end part; the first wire inlet is formed in the end surface of one end of the tip pipe and is communicated with the accommodating groove; the second wire inlet is formed in one side of the accommodating groove and is communicated with the accommodating groove; the jaw is arranged in the accommodating groove and is rotatably connected with the flat opening part; the connecting rod is coaxially arranged in the tip pipe, and one end of the connecting rod is rotatably connected with the jaw; one end of the first operation part is rotatably connected with the other end of the connecting rod; and one end of the second operation part is fixedly connected with the other end of the tip tube. The suture cutter can be used for cutting at any position of a suture line, and the defect that threading needs to be conducted from the tail end of the suture line when an existing instrument cuts the suture line is overcome.

The utility model discloses a randomly-tailorable soft lamp strip and relates to the technical field of lamps. The LED lamp strip comprises a lamp strip body, any end of the lamp strip body is electrically connected with a power line, the power line is composed of a power input end VDD and a ground GND, and the LED lamp strip is characterized in that multiple sets of lamp string circuits are sequentially arranged in the length direction of the lamp strip body and connected in parallel; the lamp string circuits are sequentially provided with a plurality of lamp beads in series, the positive electrodes of the lamp beads in the same sequence in the multiple lamp string circuits are all connected, and the negative electrodes are all connected. The upper end of the light string circuit is connected with the power input end VDD, and the lower end of the light string circuit is connected with the ground GND. According to the technical scheme, the LED lamp strip has the advantages of being convenient to use, capable of being cut at will, capable of accurately controlling the length of the lamp strip, wide in lamp bead selection range, adaptive to universal power supply voltage, low in cost and the like.

The auxiliary device comprises the sawing machine, two auxiliary feeding assemblies and an auxiliary sawing assembly, a sawing tool is arranged on the sawing machine, the two auxiliary feeding assemblies are fixedly connected to the feeding end and the discharging end of the sawing machine respectively, each auxiliary feeding assembly comprises a supporting frame and a plurality of auxiliary rollers, and the auxiliary rollers are arranged on the supporting frame. The multiple auxiliary roller bearings are connected to the supporting frame, and the auxiliary sawing assembly is fixedly connected with the portion, located on one side of the discharging end of the sawing machine, of the supporting frame.

The utility model discloses a brake hose assembly automatic bending device which comprises a machining table, a motor is fixedly connected to the bottom of the machining table, an output shaft of the motor penetrates through the machining table and is rotationally connected with the machining table, a rotating table is fixedly connected to the tail end of the output shaft of the motor, and a fixed wheel is fixedly connected to the top of the rotating table. A forming groove is formed in the fixed wheel, a pin column is fixedly connected to the top of the rotating table, the outer wall of the pin column is sleeved with a rotating block rotationally connected with the pin column, a hand lever is fixedly connected to the side wall of the rotating block, a forming bending block is placed on the rotating table, and one end of the forming bending block tightly abuts against the side wall of the rotating block. According to the brake hose assembly bending device, the position of the limiting block can be adjusted through the adjusting mechanism, the bending length of a brake hose assembly can be controlled, different machining requirements are met, and bending precision is high.

The application belongs to the technical field of tunnel mechanics experiment analysis, and discloses a soil model test box capable of realizing continuous change of fault dislocation, which comprises a box body, a first supporting part and a second supporting part arranged in the box body. The first supporting part comprises a first jacking piece, a first side plate and a plurality of first jacking plates. The first side plate can be fixedly connected with an adjacent first jacking plate or sequentially connected with the plurality of first jacking plates in the direction from the first side plate to the first jacking plates. After the first side plate is connected with the first jacking plates, the first jacking piece can drive the first jacking plates to move and simultaneously drive the first side plate to move, so that the soil body moves under the driving of the first jacking piece and the first side plate. The application realizes the control of the length of the dislocated soil body and the fault dip angle by selectively connecting different numbers of first jacking plates with the first side plate and changing the connection between the first jacking piece and the first jacking plates at different positions.