76results about How to "Not squeezed" patented technology

The invention discloses a method for simultaneously heating an inner ring and an outer ring of a main bearing of a megawatt wind turbine set. The method includes the steps that novel induction heating and magnetic induction line heating technologies are adopted; an outer ring induction line of the main bearing is directly wound on the outer ring, and the outer ring is heated to swell through vortexes generated in the outer ring of the main bearing; an inner ring induction line of the main bearing is firstly wound on a tool, then the tool is installed in the inner ring of the main bearing, and the inner ring is heated to swell through vortexes generated in the inner ring of the main bearing; the magnetic induction winding line density of the outer ring is 1.5 times-2 times that of the inner ring, and therefore it is ensured that the swelling amount of the outer ring of the main bearing is always larger than that of the inner ring at the same moment; after installation, the inner ring and the outer ring of the main bearing are simultaneously heated and swell, the heating efficiency is high, and a main bearing roller is free of any risk.

The invention provides a vehicle body structure for a battery-replaceable electric vehicle, and belongs to the field of vehicles. The vehicle body structure is of a bilateral symmetry structure. The vehicle body structure comprises a plurality of longitudinal beams and a plurality of cross beams. The longitudinal beams extend along the longitudinal direction of the vehicle, the plurality of longitudinal beams at least comprise two doorsill beams and two battery replacing longitudinal beams which are positioned on the left side and the right side of the vehicle, and middle channel side reinforcing beams which are positioned on the left side and the right side of a middle channel of the vehicle, each battery replacing longitudinal beam is connected with the corresponding doorsill beam, and the battery replacing longitudinal beams are used for mounting a battery pack. The multiple cross beams extend in the transverse direction of the vehicle and are in lap joint among the multiple longitudinal beams, and at least one cross beam is through in the transverse direction of the vehicle. According to the vehicle body structure, the battery pack can be protected from being extruded, and theproblem that the precision of a battery replacing plane is poor due to the fact that the battery replacing beam bodies are directly connected with other components through a welding process is solved.

An improved foldable tote box is made of a corrugated plastic plate, and is composed of a rectangular bottom with two side edges and two end edges, a pair of side wall plates with a folding line and integrally connected to the side edge of bottom, a pair of end wall plates connected to the end edges of bottom and folded along a folding line, two pairs of beam plates for filling corners, which is a hollow supporting beam, a cover plate connected to said side wall plate, and the locking insertion plates engaged with the fixing plates for fixing said beam plates to the corners.

The invention relates to an information management system for monitoring animal health based on an intelligent ear tag, a method and a system for positioning a bred animal with an abnormal health state, and a method, equipment and a system for managing and positioning the animal health based on the intelligent ear tag, and belongs to the technical field of livestock breeding and animal health management. The equipment for managing and positioning the animal health based on the intelligent ear tag comprises an ear tag unit, a health information acquisition and identification unit and a health information processing and management unit, wherein the ear tag unit comprises an ear tag main body, an ear tag needle body and an ear tag cap, the ear tag main body is fixedly connected with the ear tag needle body, and the ear tag needle body penetrates through one end of the ear root part of an animal and is locked with the ear tag cap; the health information acquisition and identification unit is used for acquiring animal health information data and identifying an animal ID; the health information processing and management unit is used for processing the animal health information data and displaying and recording the animal ID, regional movement information, age information and immune information. According to the equipment for managing and positioning the animal health based on the intelligent ear tag, automatic and intelligent traceability and health management of the whole life cycle of animals are realized, and individualized health monitoring management of the animals, especially livestock, is realized.

The invention discloses a heat treatment technology for reducing deformation of a GCr15 thin-wall conical ring and belongs to the field of heat treatment technology. The technology comprises the following steps: 1) machining of a spheroidized annealed blank into a thin-wall conical ring part; 2) crating; 3) front cleaning; 4) quenching: thermal insulation at 720 + / - 10 DEG C for 20 + / - 1 min, and carbon potential is 0.5 + / - 0.025%; thermal insulation at 780 + / - 10 DEG C for 20 + / - 1 min, and carbon potential is 0.5 + / - 0.025%; thermal insulation at 820 + / - 10 DEG C for 45-90 min, and carbon potential is 0.9 + / - 0.025%; and cooling in 130 + / - 10 DEG C of quenching oil; 5) post cleaning; and 6) tempering: tempering temperature is 185 + / - 5 DEG C, and time is 150 + / - 10 min. According to the invention, deformation of the thin-wall conical ring part after heat treatment is reduced, grinding allowance after heat treatment is decreased, grinding cost after heat treatment is lowered, and first pass yield for heat treatment reaches 100%.

The invention provides a reserved light unit type optical fiber composite cable which comprises light units and an electricity unit which are arranged in a cable core, wherein the light units arranged at the two ends of the cable are respectively provided with an extending section about 20cm longer than the electricity unit; the surfaces of the extending sections of the light units are provided with spring protective jackets; and the two end parts of the cable are respectively provided with a metal mesh sleeve fastened on the surface of the outer protective jacket and a metal mesh sleeve connection ring connected with a pulling rope. When light-electricity separation is carried out in the process of construction and wiring, the extending sections of about 20cm are reserved in the light units at the two ends of the cable, thus meeting the requirement when the light units enter into a distributing box or a wiring box for connection; waste can not be caused for the electricity unit whichdose not need to reserve the extending section, thereby reducing the laying cost of the cable; and when the spring protective jackets arranged on the surfaces of the extending sections of the light units can protect the light units from being extruded, the metal mesh sleeves which are arranged at the two end parts of the cable and fastened on the surfaces of the outer protective jackets and the metal mesh sleeve connection rings connected with the pulling ropes can lead the cable to be stretched by the pulling rope, stress points are focused on the end parts of the cable, and the light units are not stressed so as not to be destroyed.

The invention discloses a nursing device for preventing venous thrombosis. The device comprises a base, a first groove is formed in one end of the base, a rotating motor is arranged in the first groove, a second groove is formed in the middle of the base, the output end of the rotating motor is connected with a screw rod, the screw rod is sleeved with a moving block, a first electric push rod is arranged at the top of the moving block, and the top end of the first electric push rod is connected with a massage device. Compared with the prior art, the device has the advantages that legs can be automatically massaged, comfortable massage experience is brought to a patient, muscles can be massaged in a large range within the same time, the legs are supported, and fatigue can be effectively relieved. The effects of promoting blood circulation, reducing blood stasis, improving local blood circulation and preventing DVT are achieved, and the purposes of saving time and labor and being safe and comfortable are achieved. In addition, the device is simple in overall structure and convenient to operate.

The invention discloses a method for improving the printing quality of a printing machine. Upper and lower impression cylinders are arranged between upper and lower rubber cylinders; the upper impression cylinder is matched with the upper rubber cylinder, while the lower impression cylinder is matched with the lower rubber cylinder; each of the upper and lower rubber cylinders is covered with a stainless steel metal plate which is coated with an ink non-sticky ceramic coating, and a gap which is thicker than the thickest paper by 1-2 mm is formed between the upper impression cylinder and the lower impression cylinder; while printing, the paper passes between the lower rubber cylinder and the lower impression cylinder at first so that once reverse side printing of the paper is completed; and then the paper comes between the upper impression cylinder and the upper rubber cylinder so that once front side printing of the paper is completed. The method has the characteristics that: the paper is printed between the rubber cylinders and the impression cylinders; the impression cylinders are covered with the stainless steel plates each coated with the ink non-sticky ceramic coating; and the impression cylinders are hard so that the printed product is clear in dots and good in reducibility; and the paper is not easy to be deformed.

The invention relates to the technical field of logistics transportation equipment, in particular to a transportation box for fruits and vegetables. A right movable vertical plate on the inner side ofa box body is pulled to the right end to be fixed, so that first left movable plates, second left movable plates, first right movable plates and second right movable plates are placed in order; and according to different types of the fruits and vegetables, the fruits and vegetables are placed in a layered mode, and after placed fully inside, the right movable vertical plate is gradually pushed tounfold the first left movable plates, the second left movable plates, the first right movable plates and the second right movable plates to store the fruits and vegetables, so that the space is reasonably utilized, the fruits and vegetables are protected from being squeezed, the damage rate is effectively reduced, and the transportation effect is guaranteed; the transportation box comprises the box body, a heat preservation and heat insulation layer, refrigeration equipment, ventilation equipment, a ventilation opening, a left hinge, a right hinge, a left box door and a right box door; and the transportation box further comprises a left fixing plate, the three sets of first left movable plates, the three sets of second left movable plates, the left movable vertical plate, the right movable vertical plate, the three sets of right movable plates, the three sets of right movable plates and two sets of rollers.

The invention discloses a perfecting press. The perfecting press comprises a left color group and a right color group, wherein each color group comprises an upper plate cylinder, a lower plate cylinder, an upper impression cylinder, a lower impression cylinder, an upper blanket cylinder and a lower blanket cylinder, the upper blanket cylinder is arranged between the upper plate cylinder and the upper impression cylinder and is respectively and mutually matched with the upper plate cylinder and the upper impression cylinder; the lower blanket cylinder is arranged between the lower plate cylinder and the lower impression cylinder and is respectively and mutually matched with the lower plate cylinder and the lower impression cylinder, and the upper impression cylinder and the lower impression cylinder are respectively coated with a stainless steel metal plate which is coated with an ink-sticking prevention ceramic coating; and a first paper transferring cylinder and a second paper transferring cylinder which are mutually matched are arranged between the left color group and the right color group, the first paper transferring cylinder is mutually matched with the upper impression cylinder which is arranged on the right color group, and the second paper transferring cylinder is mutually matched with the lower impression cylinder which is arranged on the left color group. According to the perfecting press disclosed by the invention, paper can be printed between the blanket cylinders and the impression cylinders, the impression cylinders are coated with the stainless steel plates, and a printing product has clear dots and good reducibility due to the hard textures of the stainless steel plates.

An oil well pump of an underground linear motion actuator is designed for solving the technical problems that as the structure of the existing linear oil well pumps are unreasonable, thus causing a mover to be deadlocked, a stator to be scrapped, a magnet to be eroded and the service life to be short, and the like, and the oil well pump of the underground linear motion actuator comprises two large parts: an oil well pump and a linear motor, wherein, the single-level armatures of the linear motion actuator are connected with each other by threads with a spigot in a spoke-work way and are located to seal with the end surface by the spigot; a phase-change connection wire is adopted between each section of the windings; the air gap of the linear motor is sealed by a small clearance; the magnetic pole of the mover is a radical magnetic circuit pole; an air expander is arranged in an outer shell of the linear motor. The linear motion actuator is connected with the oil well pump by a screen pipe; a special pump is designed on the upper end of the pump barrel, which changes a traditional oil circuit; a plunger piston and a push rod use solid cores in a pump barrel. The oil well pump of the underground linear motion actuator has the characteristics and beneficial effects of reasonable structure, saving energy and no polluting the environment, which is suitable for the use of directional wells; the parameter can be adjusted at any time according to the changes of different well liquid.

The invention discloses a workbench for electronic product production. The workbench comprises a bottom plate. A first box is fixedly connected to the top of the bottom plate. A second box is fixedlyconnected to the bottom of the right side of the first box. A motor is fixedly connected to the top of a second box inner cavity. A first bevel gear is fixedly connected to the bottom end of a motor rotary shaft. The bottom plate, the first box, the second box, the motor, the first bevel gear, a second bevel gear, a rotary rod, a both-way threaded rod, a limiting block, a movable block, a fixed part, a telescopic plate, a vertical plate, a fixed block, a connecting rod, a large pulley, a connecting block, a sliding rail, a strut, a workbench body, a baffle, a spring, a buffer pad, a wheel rodand rolling wheels are matched ad used, the workbench can rise and fall freely through simple operation, thus use is convenient for different staff, the workbench can also adapt to different production needs, a product can also be clamped, and production is convenient for people.

A magic cube pillow capable of lying on back, side and stomach is formed by connecting a main pillow and two auxiliary pillows embedded on respective pillow frame through two rotatably positioned fulcrums. The magic cube pillow can be changed, when people lies on back and on side, the main pillow and the two auxiliary pillows are combined so that the magic cube pillow is same as the common pillow, if the main pillow and the auxiliary pillows separate upwards for a certain angle, the neck is high and the head is low when the head is on the pillow so as to form a back-bending sleeping position. When lying on stomach, people takes out a T-shaped pillow core embedded in a T-shaped groove of a main pillow core, eyes are placed in a transverse groove of the T-shaped groove and are not subject to extrusion, the nose is placed in a vertical groove of the T-shaped groove and can freely breathe, the forehead part and the face part of the head are placed on the main pillow core to bear the weight of the head, two auxiliary pillows on the sides are moved to the lower side of shoulders through the fulcrums to support the shoulders, i.e. the breasts, so that a clearance is reserved between the breasts and the bed surface without extrusion so that people can possibly lie on stomach for a long time. The whole magic cube pillow has the advantages of compact structure and flexible and convenient use.

The invention discloses a far-infrared air-circulation physiotherapy pillow. The far-infrared air-circulation physiotherapy pillow comprises a pillow case and an inner cavity in the pillow case. The pillow case is of a U-shaped structure and comprises a head massage area, a neck massage area and a shoulder massage area, wherein the head massage area accords with the concave part of the outline of the head of the human body, and a plurality of massage points are arranged in the concave part, the shoulder massager area is a massage air bag with the width according with that of the shoulders, and a plurality of massage points are arranged on the surface of the massage air bag,; the cavity is a circinate air channel, and an opening of the channel is formed in the pillow case. The far-infrared air-circulation physiotherapy pillow further comprises a far infrared gas supply pump and a motor, the far infrared gas supply pump is connected with the opening of the channel through a gas pipe channel, and the far infrared supply pump is connected with the motor through a pipeline. According to the far-infrared air-circulation physiotherapy pillow, blood circulation is promoted for people, ultrasonic wave vibration is generated through a vibrator, and the effect of promoting local blood circulation, removing blood stasis, diminishing inflammation and easing pain are achieved through heating.

The invention relates to a method and a device for reinforcing corners of a corner-plate type carton, and belongs to the technical field of carton package. The device comprises a separator charging structure, wherein a separator glue-spray device is arranged at the top end of a separator charging device; a carton delivery device is arranged on one side of the separator charging device; a separator grasping placement device is arranged at the upper part of the separator charging device. According to the method and device for reinforcing corners of a corner-plate type carton, corners of a carton can be reinforced by means of automatic charging and bending, automatic glue spraying and automatic grasping placement on separators, automatic production is realized, and the working efficiency is greatly improved; the requirement for reinforcing a carton can be met by only reinforcing corners, so that the cost is low.

The invention relates to the technical field of machining, in particular to an intelligent machine tool with combination of drilling and tapping. The machine tool comprises a base, a workbench, an XY-axis driving mechanism and a positioning clamp. The machine tool further comprises a rotating shaft and a clearance rotation positioning mechanism. The rotating shaft is vertically and rotatably inserted in the side, away from the XY-axis driving mechanism, of the workbench, four extending plates distributed at equal intervals are arranged on the top of the rotating shaft, a vertically-arranged vertical mounting plate is arranged at the tail end, away from the rotating shaft, of each extending plate, a first lead screw driver is arranged on each vertical mounting plate, a drilling machine is arranged at the working end of each first lead screw driver, and drill bits of different models are arranged on each drilling machine. A working end of an overturn positioning mechanism is in transmission connection with the rotating shaft. According to the intelligent machine tool with combination of drilling and tapping, the rotating shaft and a plurality of drilling machines with drill bits of different models are automatically driven to rotate in a clearance manner through the clearance rotation positioning mechanism, the needed drilling machines can be stably and rapidly moved to the position above the workbench to carry out machining on workpieces, and the working efficiency and precision are improved.

The invention relates to a high-temperature-resistance oxygen sensor device. The high-temperature-resistance oxygen sensor device comprises an oxygen sensor, a heat-insulating insulating pipe and a protective sealing cylinder; one end of the oxygen sensor is connected with one end of the heat-insulating insulating pipe, and the protective sealing cylinder is arranged on the outer side of the heat-insulating insulating pipe in a sleeving mode; the oxygen sensor is a detecting main body, one end of the oxygen sensor is connected with a plurality of cables, a plurality of through holes are formedin the heat-insulating insulating pipe in the length direction of the heat-insulating insulating pipe, and the multiple cables penetrate through the multiple through holes in a one-to-one correspondence mode; and the space between the protective sealing cylinder and the heat-insulating insulating pipe is filled with a heat-insulating material, one end of the protective sealing cylinder is connected with the oxygen sensor, and sealing is formed by the other end of the protective sealing cylinder and the heat-insulating insulating pipe through a plugging plate. According to the high-temperature-resistance oxygen sensor device, the working life of a common oxygen sensor is effectively prolonged, the operation damage rate of the high-temperature-resistance oxygen sensor device in the high temperature environment is decreased, and normal transmission of a measuring signal value is ensured.

The invention discloses an elastic underskirt to protect nipple, which is characterized by the following: setting a nipple nest to adapt the size and depth of nipple; making two breast covers through elastic fabric; protecting nipple from pressing; reducing breast vibration; accelerating blood circulation of nipple.

The invention belongs to the technical field of optical cables and particularly relates to a combined framework optical cable. The optical cable comprises an outer sheath on the outermost layer and an inner cable core assembly, wherein the cable core assembly comprises a spiral center shaft and six cable core belts, the spiral center shaft is spirally twisted around the axis of the spiral center shaft, and all the cable core belts are evenly arranged around the spiral center shaft; a buckling structure is arranged at a contact part of the spiral middle shaft and the cable core belt; the middle part of the cable core belt is provided with a cable core cavity, and the cable core cavity is filled with an optical fiber belt. The cable core assembly further comprises a shoulder strap clamping piece, and every two adjacent cable core belts are fixed together through the corresponding shoulder strap clamping piece. The optical cable is advantaged in that the whole framework structure is formed by combining the cable core belt, the shoulder belt clamping piece and the spiral center shaft, the cable core belt and the shoulder belt clamping piece are in a horizontally-extending strip shape in the natural state, therefore, during production, an optical fiber ribbon can be easily placed into a cable core cavity of the cable core belt, and after the cable core belt, the shoulder belt clamping piece and the spiral center shaft are combined, under the action of the spiral center shaft, an additional installation process is supplemented, the whole formed cable core assembly is in a spiral twisting state.

The invention discloses a power cable for elastic cold-resistant wind power generation. The power cable comprises a cable core, wherein the cable core is formed by twisting a plurality of reinforcingelastic cold-resistant insulation wire cores, heat insulation cotton is arranged at gap positions of the cable core, the cable core is extruded with a mineral insulation layer, a flame-resistant glassfiber belt is arranged outside the mineral insulation layer and is externally extruded with an inner sheath, the inner sheath is externally braided with an armor layer with a non-magnetic steel wireand magnetic steel strip metal structure, an aluminum foil layer is arranged outside the armor layer and is wounded with an elastic buffer layer, and the elastic buffer layer is externally extruded with a polyurethane heat-insulation tube. The power cable for elastic cold-resistant wind power generation has fireproof, waterproof, windproof, sun-proof, mold-proof, cold-resistant ageing-resistant and wind pressure-resistant properties and the like.

The invention discloses a temporary wire passing groove for municipal construction. The temporary wire passing groove includes a groove body, the groove body includes two symmetrically arranged guide blocks and a connection block matched with the two guide blocks, grooves are arranged in positions of top surfaces of the guide blocks close to front and rear sides, one sides of the grooves, which are arranged vertical to bottom surfaces of the guide blocks, are provided with mounting holes, reflectors are arranged in the mounting holes, an internal position of the connecting block is provided with an accommodating cavity for placing a wire, the top surface position of the accommodating cavity is provided with a top cover, and a support pillar is arranged in a position between a stop block and the accommodating cavity; according to the temporary wire passing groove for municipal construction, the wire is placed through the accommodating cavity arranged in the middle of the connection block, the top position of the wire is provided with the stop block and support pillar to reduce pressure of the top, thus the wire can be protected from extrusion, the reflectors are arranged and can remind passing vehicles to move slowly, and the device is relatively simple in structure and relatively low in cost, and is suitable for popularization and use.

The invention provides craniocerebral injury protection apparatus, and belongs to the technical field of medical instruments. The craniocerebral injury protection apparatus comprises a bottom plate, and two groups of fixing apparatuses and two groups of position-limiting apparatuses which are symmetrically arranged on two sides of the bottom plate respectively, a head protection pad with a cambered surface is arranged at the top of the bottom plate, a position-limiting groove matched with the head is formed in the middle of the head protection pad, each group of fixing apparatus comprises a moving plate, a push plate and driving apparatus, each movable plate is vertically erected at the top of the bottom plate, each movable plate is driven by the corresponding driving apparatus to slide onone side of the head protection pad, each push plate is fixedly arranged on the side, facing the head protection pad, of the corresponding movable plate through a plurality of springs, a head protection pad notch is formed in the bottom of each push plate, each group of position-limiting apparatus comprises a position-limiting plate and a position-limiting module, each position-limiting plate penetrates through the lower end of the corresponding push plate, is in sliding fit with the corresponding push plate, and is limited by the corresponding position-limiting module, and semicircular grooves matched with the neck are formed in the opposite ends of the two position-limiting plates. The apparatus can assist in fixing the brain, and thereby the secondary injury to a patient suffering fromthe craniocerebral injury is avoided.

The invention relates to the technical field of cable protection tubes, and discloses a reinforced high-efficiency multilayer cable protection tube which comprises a cable protection outer tube body and a cable winding displacement assembly. The cable protection outer tube body is a cylindrical structure, a corrosion-resistant layer is arranged in the cable protection outer tube body, a high-temperature-resistant layer is arranged in the corrosion-resistant layer, a fixing pipe is arranged in the high-temperature-resistant layer, and a groove is formed in the inner wall of the fixing pipe by acircle. The cable arranging assembly is arranged in the fixing pipe and comprises awinding displacement core frame, multiple sets of supporting frames are annularly welded to the outer side of the winding displacement core frame at equal angles, a first winding displacement assembly is welded to the top ends of the supporting frames, the first arranging assembly is in a semi-circular ring shape,and a second winding displacement assembly is arranged opposite to the first winding displacement assembly. A plurality of cables can be fixed separately to be prevented from being wound and knotted,cables of different thicknesses can be contained, the application range is wide, and the working efficiency is improved.

The invention discloses a planting box of a roof garden. The planting box comprises a box body which is internally provided with a planting substrate layer, a filtering layer and a waterproof layer; wherein the planting substrate layer, the filtering layer and the waterproof layer are successively arranged from top to bottom. The planting box further comprises a water storage layer which is arranged between the filtering layer and the waterproof layer. Furthermore a separation network is arranged between the water storage layer and the filtering layer. The separation network is fixedly arranged on the sidewall of the box body. According to the planting box of the roof garden, through arranging the water storage layer between the filtering layer and the waterproof layer, and performing water absorption and water discharging through a sponge, high convenience in watering the planting box is realized. When a relatively large amount of water is applied, the water is absorbed by the sponge, thereby preventing water accumulation in the planting substrate layer; and when water shortage occurs in the planting substrate layer, the sponge performs water discharging contrarily, and the water content of the planting substrate layer is ensured, thereby keeping water balance in the planting box and realizing good water content of the plant.

The invention discloses an anti-explosion heat dissipation type computer cable, comprising a cable core. The cable core is formed by oppositely twisting a pair of insulated wire cores; the outside ofthe cable core is filled with a glass fiber tape, an inorganic thermal insulation fire protection layer is arranged outside the cable core, a steel belt shielding layer is arranged outside the inorganic thermal insulation fire protection layer, a halogen-free flame retardant polyethylene woven belt is arranged outside the steel belt shielding layer, an elastic buffer layer is extruded outside thehalogen-free flame retardant polyethylene woven belt, and a high flame retardant three-low smoke halogen-free flame retardant environment-friendly type anti-explosion sheath layer is arranged outsidethe elastic buffer layer; a filling position of the cable core is further provided with a flow guiding copper alloy hose in which water cooling liquid is added. The anti-explosion heat dissipation type computer cable has the characteristics of anti-explosion, fire retardance, heat dissipation, anti-electromagnetic interference and the like, the cable structure is simple, the signal transmission isstable, the anti-electromagnetic interference performance is outstanding, and the cable can stably operate for a long time in the severe environment.

The present invention relates to massage brassieres with magnetic bead, active factor and cream, and features that the massage brassieres have two wide shoulder belts with far infrared magnet beads, one back buckle of woven fabric with printed far infrared powder, and two brassieres cups of multilayer cotton cloth structure with printed far infrared powder in the inner layer and cream bag between the layers. The cream bag has one outer sprayed nanometer silver layer, homogeneously distributed bead lobes in the inner layer, and magnetic beads, flexible beads, cream of active components, chitin and bamboo charcoal powder inside the bag. The massage brassieres possess unique structure, comfort, high air permeability, excellent massage function and capacity of preventing mastoptosis.