91results about How to "Avoid hitting each other" patented technology

The invention discloses a first-aid packet. A first-aid packet body comprises an upper surface, a lower surface, a left surface, a right surface, a front surface and a rear surface, the rear surface is connected with the upper surface, the lower surface, the left surface and the right surface, the right surface is connected with the front surface, the left surface is connected with the front surface through a zipper, the upper surface and the lower surface are connected with the left front surface and the right front surface in a fitted manner, two straps are arranged on the outer side of therear surface, a plurality of transparent first pockets with pocket flaps are arranged on the inner side of the upper surface, medicines are placed into the first pockets, a plurality of second pocketswith venous transfusion puncture objects are arranged on the inner side of the left surface, a plurality of third pockets with air passage protection objects are arranged on the inner sides of the right surface and the front surface, a plurality of transparent fourth pockets with gloves, tongue forceps, suction balls, haemostatic forceps and gauzes are arranged on the upper portion of the inner side of the rear surface, elastic fixing bands for fixing a Y-type joint, an electric flashlight, scissors, a thermometer and a percussion hammer are arranged on the lower portion of the inner side ofthe rear surface, a plurality of storage bags with an automatic sphygmomanometer, a fetus-voice meter, coupling agents, a stethoscope and a handheld pulse oximeter are arranged on the inner side of the lower surface, and at least one resuscitation bag is placed into the first-aid packet body.

The invention discloses an air source heat pump system which can unintermittently supply heat under the working condition of defrosting and relates to an air source heat pump system. The system solves the problems that the prior defrosting mode has drastic change of air suction pressure, stops heat supply and blows cold wind indoors in the defrosting process. The outlet end of a compressor is communicated with a first port of a four-way reversing valve; a second port of the four-way reversing valve is communicated with the inlet end of an indoor machine; the outlet end of the indoor machine is respectively communicated with one end of a first bypass shunt circuit, one end of a second bypass shunt circuit and one end of a third bypass shunt circuit through a throttling mechanism; the other end of the first bypass shunt circuit, the other end of the second bypass shunt circuit and the other end of the third bypass shunt circuit are communicated with a third port of the four-way reversing valve; a fourth port is communicated with the inlet end of a gas-liquid separator; and the outlet end of the gas-liquid separator is communicated with the inlet end of the compressor. The system realizes unintermittent heat supply in the defrosting process, simultaneously reduces drastic change of air suction pressure of the compressor and is more stable in the conversion process of heat supply and defrosting.

The invention discloses a water volume adjusting rod. The water volume adjusting rod comprises a rod body capable of relatively rotating, and a rotating cover coating the outer side of the lower part of the rod body, wherein a center hole extending in the length direction is formed in the rod body, and comprises an adjusting rod in the lower side; an annular groove surrounding outside the adjusting hole is formed in the end part, corresponding to the adjusting hole, of the rod body to form an inner side peripheral wall and an outer side peripheral wall at intervals; the upper part of the rotating cover and the outer peripheral surface of the rod body are tightly connected; a water inlet hole and a water outlet hole are formed in the peripheral wall of the rotating cover; and multiple corresponding throttle holes are formed in the outer side peripheral wall of the rod body. The adjusting rod can effectively guide and arrange water currents, can effectively prevent high-speed water currents from being directly collided with pipe walls or from being collided with each other in the flowing process, effectively prevents a turbulent state, effectively prevents the noise, and effectively reduces the noise when the flowing speed of the water currents is the highest.

The invention provides a self-elevating offshore platform and a submersible pump tower thereof. The submersible pump tower comprises a tower pipe and a plurality of guide devices arranged at intervals along the height direction of the tower pipe, and a sliding groove is formed in the outer side of each guide device, so that the guide device is slidably matched with guide rails on a pile penetrating pipe. Each guide device comprises a first clamping part, a second clamping part, a fixing part and an adjusting part, each clamping part comprises a base and a breast board fixed onto the base, the base of the first clamping part is fixedly connected with the tower pipe, the bases of the two clamping parts are fixedly connected through the fixing part, the breast boards of the two clamping parts are opposite and spaced, the sliding groove is formed between the two breast boards, the adjusting part is arranged between the first clamping part and the second clamping part of each guide device to adjust the gap of the sliding groove between the two clamping parts, and the gap of the sliding groove of an overwater guide device is larger than that of the sliding groove of an underwater guide device. Further, the underwater guide device is flexibly matched with the guide rails through elastic parts. The problem of sliding clamping stagnation of the submersible pump tower is solved.

The invention discloses a buffer self-attraction vertical type board body drawer structure. The buffer self-attraction vertical type board body drawer structure comprises a pair of riding buffer guide rails, a pulling basket assembly for containing tableware, a drawer assembly, a cabinet inner container and a draw fixing support set; the draw fixing support set and the drawer assembly are riveted into a whole to be fixed to the riding buffer guide rails in a locking manner to form a vertical type mutual supporting intensity board body drawer structure; the drawer self buffer attraction function is achieved; pulling and pushing are stable; mutual collision between the tableware is avoided in the pulling-and-pushing process; and the bearing intensity is high. Meanwhile, the service life of a drawer is long; the condition that the drawer is not closed in place in the using process of the user is avoided; and the buffer self-attraction vertical type board body drawer structure is more user-friendly. The riding buffer guide rails are fixed to the cabinet inner container, and the bottoms of the riding buffer guide rails are installed on the lateral faces of the cabinet inner container in a locked manner, so that the lateral-fixation bottom-supporting high-supporting-force effect is achieved. In addition, the drawer structure further has the functions of drawer water collecting, cabinet inner container bottom plate water guiding and cavity externally-arranged water receiving box water receiving; a water collecting box can be taken out, and therefore convenience is brought to washing; and the pulling basket assembly can be taken out, so that accumulated water in the drawer is avoided, cleaning is simple and convenient, and an inner cavity is clean and dry.

The invention relates to the technical field of fabricated buildings, and discloses a beam-column structure for anti-seismic support of a fabricated building. The structure comprises a bearing column, wherein a reinforcing steel bar frame is fixedly mounted in the bearing column, and avoiding grooves are formed in the top of the bearing column; and four first reinforcing steel bar strips extending into the avoiding grooves are fixedly installed in the bearing column, a fixing base is fixedly installed at the bottoms of the inner walls of the avoiding grooves, and four fixing feet welded to the four first reinforcing steel bar strips are fixedly installed on each of the left side and the right side of the fixing base. According to the beam-column structure for the anti-seismic support of the fabricated building, beams and columns can be effectively fixed, assembly operation is facilitated, the pouring amount is relatively small, the time and energy required by beam-column assembly can be reduced, meanwhile, ground vibration can be effectively buffered and blocked, upward transmission of the vibration is avoided, the structural stability of the fabricated building is improved, mutual impact between structures is avoided, and the service life is prolonged.

The invention discloses an agricultural chemical fertilizer bag-breaking and mixing device. The device comprises a feeding hopper and a first base, the first base is welded to the outer wall of the bottom of the feeding hopper, turning plates are hinged to the tops of the inner walls of two sides of the feeding hopper, rubber pads are bonded to the ends, close to each other, of the two turning plates, and inserting rods are slidably connected to the bottoms of the two turning plates. When the device is used, a chemical fertilizer bag is placed at the tops of the two turning plates, the two blades are inserted into the chemical fertilizer bag to realize bag breaking, the turning plates are pressed and bent downwards, the inserting rod downwards press the spring, a chemical fertilizer goes through a gap between the two turning plates and falls into the feeding hopper, the spring gradually pushes the turning plates to reset upwards through the inserting rods in the process of reducing theweight of the chemical fertilizer above the turning plates, and after the chemical fertilizer falls completely, the chemical fertilizer packaging bag above the turning plates is taken down, and the spring pushes the turning plates to reset completely; and the two rubber pads can guarantee that the feeding hopper has a good sealing performance, and prevents the two turning plates from colliding with each other.

The invention relates to a steel strip surface roll coating machine, and belongs to the technical field of cold roll coating equipment. The steel strip surface roll coating machine comprises a coatingroller, a liquid take-up roller and a driving motor, the two ends of each of the coating roller and the liquid take-up roller are supported on bearing seats through bearings, and extending-out shafts, located at the transmission side, of the coating roller and the liquid take-up roller are connected with the driving motor. The steel strip surface roll coating machine is characterized in that thebearings located at the transmission side and on the coating roller and the liquid take-up roller are center-adjusting floating bearings, the bearings located on the operation side and on the coatingroller and the liquid take-up roller are self-center-adjusting roller bearings, and the bearing seats are fixed on a rotatable rotating platform. The steel strip surface roll coating machine can realize free adjustment of the single-side pressure between the coating roller and strip steel and between the liquid take-up roller and the coating roller, film thickness defects caused by abrasion of theroller face of the coating roller and the coincident thicknesses of the two sides of the strip steel can be effectively eliminated, the uniformity and precision of the film thickness are improved, and the stable quality of a coating film on the surface of the steel strip is ensured.

The invention belongs to the technical field of metal processing, and specifically relates to a spray system for quenching equipment, including a cooling water pipeline, a water supply pump, a spray rod and a nozzle, and the spray rods are divided into two rows and installed in the quenching equipment respectively On the upper and lower sides of the roller, each row of spray bars is arranged in parallel with the roller, and the nozzles are vertically installed on the spray bars, and the nozzles are conical flat nozzle nozzles, and the spraying The mouth is elongated, and each spray bar is equipped with a plurality of flat nozzle nozzles arranged in parallel, and the angle between the flat nozzle spray heads and the spray bar is 15°. The spraying system can be used to realize the online roller bottom type aluminum alloy plate quenching and quenching process, reduce energy consumption and improve the solid solution performance of the plate. The design of the conical flat nozzle nozzle and the adjustment of each row of nozzles at an angle of 15° during installation can prevent the fan-shaped surfaces of adjacent nozzles from colliding with each other when spraying, ensuring the cooling effect.

The invention discloses a satellite navigation ground-based simulation device and method and belongs to the technical field of satellite navigation ground-based simulation. The satellite navigation ground-based simulation device comprises a positioning base station group, a to-be-traced part and a receiving control module and is characterized in that the positioning base station group is mounted in a simulation type drone group, the positioning base station group positions the to-be-traced and transmits a position signal to the receiving control module, the receiving control module receives the position signal transmitted by the positioning base station group, and the precise position can be acquired through calculating. The satellite navigation ground-based simulation device has the advantages that the positioning base station group is mounted in the simulation type drone group, the simulation type drone group moves regularly on a preset rail to simulate satellite operation, the positions of positioning base stations are controlled and changed directly through the receiving control module, mounting and demounting are avoided, manpower and time are saved, potential safety hazards in mounting and demounting operation are eliminated, and satellite navigation system simulation can be achieved safely and conveniently.

The invention relates to an upper air inlet combustor. The combustor is characterized by comprising a first injection pipe, an inverted T-shaped base, and a first fire cover; the first injection pipecomprises an air outlet end and an air inlet end, and a first ejector is matched at the air inlet end; and the first fire cover overlies a vertical pipe to form a centrally located first air mixing chamber. Compared with the prior art, the combustor has the advantages that the first injection pipe is completely enclosed in a horizontal pipe of the base, and the first injection pipe cannot be madeto be too long due to processing limitation, therefore, a spiral channel formed by spiral ribs on the inner wall of the horizontal pipe in the base can drive gas and primary air to enter the first airmixing chamber after being uniformly mixed along the spiral channel, so that the flame of the upper air inlet combustor is short, uniform and powerful, and the defects of yellow flame, tempering andthe like are avoided.

The invention provides a method for designing a pulling and pressing loading head in a concrete multiaxial test, belongs to the technical field of concrete structure engineering tests, and particularly relates to the method for designing the pulling and pressing loading head in the concrete multiaxial test. A pulling loading head in the pulling and pressing loading head is combined by a bolt pull rod with a semicircular spherical hinge and a pulling loading plate with a concave type spherical hinge. A pressing loading head is of a design with a front variable cross section and a rear variable cross section. The front portion is the pressing loading head, and the rear portion is an electromagnetic attraction base. The pressing loading head is connected with the electromagnetic attraction base through an electromagnetic lock. According to the method for designing the pulling and pressing loading head, the pulling and pressing loading head can be conveniently and accurately adjusted to be centered, uniform stress is achieved, loading heads in two or three directions can be prevented from being mutually collided and intersected due to eccentricity and deflection of the pressing loading head in the loading process, and concrete multiaxial strength and deformation can be conveniently and accurately measured; and the method can be applied to the pulling and pressing loading head design in the concrete multiaxial test.

The invention discloses a grate seam self-cleaning device of a ball mill. The grate seam self-cleaning device comprises grate plates, an installation plate, an installation base, a spring and a buffersleeve. The grate plates can be spliced to form a circular bin partition plate, and the grate plates and the installation plate are connected and fastened through bolts. The installation base is connected to the inner wall of a barrel of the ball mill through bolts. The circular bin partition plate and the installation base are connected through the spring. The buffer sleeve is arranged outside the spring in a sleeving manner to prevent collision between the bin partition plate and the installation base. Horn mouths are arranged on grate seams on the grate plates. By means of the horn-shapedgrate seams, coarse particles are prevented from being stuck at the positions of the grate seams. The bin partition plate composed of the grate plates can shake by itself in the operation process of the machine, and therefore materials stacked at the positions of the grate seams are shaken off and shaken to be loose, and self-cleaning of the grate seams is achieved.

The invention relates to an upper air inlet burner. The upper air inlet burner comprises a base for accommodating a first injection pipe, a connector arranged on the base and a first burner cap connected to the connector, wherein the connector is provided with a vertical first gas channel and can cover the base; a first gas mixing chamber located at the center is formed between the first burner cap and the connector; and the first gas mixing chamber corresponds to the first gas channel. The upper air inlet burner is characterized in that the first injection pipe is transversely arranged in thebase; an inner cavity of the first injection pipe comprises a transition section and a horn section in sequence in the gas flow direction from a gas inlet to a gas outlet; and a buffer cavity is formed between the horn section and the lower surface of the first gas channel. Compared with the prior art, the upper air inlet burner has the advantages that the first injection pipe is arranged in thebase and provided with the buffer cavity; the length of the first injection pipe is effectively increased through the buffer cavity; and meanwhile, through arrangement of the buffer cavity, a primaryair / gas mixture injected from the gas outlet end of the first injection pipe can have a buffer space.

The present invention discloses a scroll device with axial gap control function, in particular, it relates to a scroll device with the function capable of controlling axial gap between its fixed scroll and revolving scroll. Said scroll device includes the following several portions: a scroll device shell body; a skeleton which is placed in the interior of scroll device shell body and has a pair of reccesses; a pair of flexible elements which are placed in top side of said skeleton and spanned over said pair of reccesses, in the in the spanned place a hanging flexible section is formed; a perisporium equipped with a positioning ring with a pair of downwards-extended projection bodies, said pair of projection bodies is correspondent to said reccesses, and the projection bodies of said positioning ring are fixedly connected with the flexible section of said flexible elements; a fixed scroll a suspended from said positioning ring; and a revolving scroll which is fixed in said fixed scroll and is revolved.

The invention discloses an intelligent water meter with an automatic flow correction function. The intelligent water meter comprises a shell, an inlet pipe, an outlet pipe, a meter head and an impeller, wherein the side faces of the shell are connected with the inlet pipe and the outlet pipe, the impeller is arranged in the shell, the meter head is arranged at the top of the shell, the upper end of the impeller is connected to the meter head, the inlet pipe and the outlet pipe are tangent to the outer edge of the impeller in an arc mode, and a fine adjustment assembly is arranged at the upper end of the impeller and adjusts the rotation resistance moment of the impeller. Water flow can fully drive the impeller to rotate through water inlet and water outlet in the tangential direction, so that accurate counting is obtained in the meter head; and the fine adjustment assembly at the upper end of the impeller is used for adjusting the rotation resistance of the impeller, and the rotation resistance is approximately consistent with the rotation resistance during factory calibration through active adjustment of the rotation resistance of the impeller, so that the flow-rotating speed correspondence relation established during factory calibration is kept in an accurate state, and slow running of the water meter caused by a resistance moment error is eliminated.

The invention discloses a storage device for electric experimental tools. The storage device comprises a main box, wherein the main box is composed of a left main box and a right main box; a fixed beam arm is fixedly connected between the left main box and the right main box; the upper end of the beam arm is provided with a switch; one end surface of the beam arm is provided with a battery and anillumination lamp; cross telescopic arms are fixedly connected to two ends of the left main box and the right main box; one end of the central point of each cross telescopic arm is fixedly connected to a sliding chute; six sets of secondary boxes are arranged between the sliding chutes; sliding blots are arranged at two ends of each secondary box; the inner walls of the secondary boxes, the left main box and the right main box are all provided with a storage groove; the storage groove is provided with a hook and loop fastener; and one end surfaces of the left main box, the right main box and the secondary boxes are provided with sliding doors. By means of the storage device, the secondary boxes can be disassembled to facilitate manual replacement of the electric experimental tools, and meanwhile, the hook and loop fastener is adopted to reinforce the placed electrical tools, so that the electrical tools are prevented from colliding each other.

The invention relates to a preparation method of a general intermediate ECPPA of ACEI medicines. The method comprises the steps of preparing benzoylacrylic acid, preparing ethyl benzoylacrylate, preparing L-alanine benzyl ester p-toluenesulfonate, preparing N-((S)-1-ethoxycarbonyl-3-acetylphenyl)-L-alanine benzyl ester, and preparing N-((S)-1-ethoxycarbonyl-3-phenylpropyl)-L-alanine. Compared with the prior art, the method provided by the invention has the advantages of product yield increase, raw material cost reduction, separation step reduction, and catalyst cost reduction.

The invention relates to a steel structure distance control cushion block which comprises a distance control block. An upper baffle is arranged on the upper portion of the distance control block, and a base plate is arranged on the lower portion of the distance control block. Rectangular grooves are formed in the front side and the rear side of the upper baffle respectively. Clamping teeth are arranged on the upper side walls and the lower side walls of the rectangular grooves respectively. Cushion blocks are arranged on the left end face and the right end face of the base plate respectively. Claws are arranged on the left side and the right side of the upper baffle respectively. Retraction arms are arranged on the front sides and the rear sides of the claws respectively. Meshing blocks are arranged on the upper sides and the lower sides of the outer end faces of the retraction arms respectively in a hinge mode. The meshing blocks are wedge-shaped blocks, the meshing blocks are correspondingly meshed with the clamping teeth on the upper side walls and the lower side walls of the rectangular grooves respectively, a groove is formed in the lower end of each meshing block, and a spring is arranged between the two meshing blocks on the same retraction arm. The safety performance of the device is improved through the matching structure of the meshing blocks with the self-locking function and the clamping teeth, and impacts between steel structures can be relieved more drastically through the cushion blocks on the base plate. The claws with the position adjustable can be effectively suitable for the steel structures of different thicknesses.

The invention discloses a pressure sensor. The pressure sensor comprises an outer shell; the outer shell is provided with a connecting opening; the exterior of the connecting opening is provided with an interface screw thread; a pressure-introducing hole is formed at the middle of the connecting opening; a circuit board is arranged in the outer shell; one surface of the circuit board is provided with a pressure chip and a module circuit group; the other surface of the circuit board is provided with leads; the leads extend out from the outer shell; a clamping ring is arranged between the circuit board and the outer shell; a filling sheet is arranged in the outer shell; and the outer shell is filled with an insulating liquid. The pressure sensor of the invention has the advantages of simple and ingenious structure, low production cost, high impact resistance, high insulation performance, and high measurement precision, and can effectively reduce zero drift phenomena.

The invention discloses a protective device for a chemical agent storage tank. The protective device comprises a barrel body, a barrel cover is connected to the top of the barrel body in a clamped manner, a mounting opening is formed in the top of the barrel cover, a foam pad is bonded to the inner wall of the bottom of the barrel body, an embedding groove is formed in the center of the top of thefoam pad, and a storage tank is embedded in the embedding groove; and the top of the storage tank extends to the outer side of the barrel cover through the mounting opening, a rubber pipe is arrangedin the barrel body, springs distributed at equal intervals are bonded to the outer wall of the rubber pipe, and the ends, away from the rubber pipe, of the springs are welded to the inner wall of thebarrel body. According to the protective device, the whole storage tank, the barrel body and the barrel cover form a regular cylindrical structure, stacking and storage are facilitated in the storageand transportation process, impact force generated by vibration can be buffered in the transportation process of the storage tank, and the storage tank is prevented from being damaged; and a transparent observation window can be shielded or exposed by moving a shading plate, so that sunlight is prevented from directly irradiating the storage tank, and the service life of agents in the storage tank is prolonged.

The invention discloses an automatic anti-collision noise reduction device used on a pipe gravity conveying frame. The automatic anti-collision noise reduction device comprises a flat plate, a triggering rod, a pipe blocking hook and a stop pin. The triggering rod is rotationally connected with one side of the flat plate through a first spring and a first fixing shaft. The pipe blocking hook is rotationally connected with one side of the flat plate through a second spring and a second fixing shaft. A clamping groove is formed in one end of the triggering rod, and a movable groove is formed in one end of the pipe blocking hook. A hook hanging shaft is fixedly installed in the movable groove, and the hook hanging shaft is fixedly connected with the clamping groove through a third spring in a clamping manner. The stop pin is fixed on one side of the flat plate and is located above one end of the triggering rod. The triggering rod is in an arch shape, before the triggering rod and the pipe blocking hook rotate relative to the flat plate, the middle portion of the triggering rod is higher than the upper surface of the flat plate, the other end of the triggering rod is lower than the upper surface of the flat plate, and the other end of the pipe blocking hook is higher than the flat plate. According to the automatic anti-collision noise reduction device used on the pipe gravity conveying frame, due to the fact that the triggering rod, the pipe blocking hook and the flat plate are matched, mutual collisions of steel pipes in the rolling process are avoided, a buffering role is achieved on rolling of the steel pipes, and therefore noise generated by steel pipe rolling is lowered.

The invention discloses an apricot picking device which is characterized in that the picking device comprises a picking rod, a collecting hopper and a collecting frame, a controller is mounted on theright side of the picking rod, a storage battery is mounted on a first partition plate in a power supply warehouse, the end of a rack extends out of a kinetic warehouse, a picking portion is arrangedat the end of the rack, a second guide groove is formed in the inner wall of an outer rod between a moving seat and the outer rod, a second guide projection is arranged in the second guide groove, sothat the moving seat can drive an inner rod to move back and forth in the outer rod in the moving process, a bearing is arranged at the left end of the picking rod in sleeving manner and connected with the collecting hopper through hinges, a discharging through hole is communicated with a collecting pipe, the collecting pipe is communicated with the collecting frame, a plurality of clamping grooves are uniformly distributed on a rotating disk, circular clamping plates matched with the clamping grooves are arranged on the rotating disk, anti-collision mats are arranged on the circular clampingplates and the clamping grooves, and a material door is arranged on the side of the frame. The apricot picking device has the advantages of simple structure, convenience in collect, low labor intensity and high efficiency.

The invention discloses a glass bottle classifying and recycling device, and relates to the technical field of environmental protection. The glass bottle classifying and recycling device comprises a box body, wherein the inner wall of the box body is rotatably connected with two belt wheels through a connecting shaft; the two belt wheels are connected through a conveyor belt; baffle plates are uniformly distributed on the surface of the conveyor belt; the connecting shaft of one belt wheel is connected with a motor; one inner wall of the box body is fixedly connected with an annular cover plate relative to the conveyor belt; a notch is formed in the upper surface of the annular cover plate, and a detection box is fixedly connected relative to the notch; a plurality of discharge holes are formed in the lower surface of the annular cover plate, and discharge pipelines are fixedly connected relative to the discharge holes; a bottle storage box is mounted on the inner bottom surface of thebox body corresponding to the discharge pipelines; and corresponding feeding holes are formed in one side wall of the box body and one side wall of the detection box. According to the glass bottle classifying and recycling device, the detection box is arranged for detecting glass bottles, so that the glass bottles are classified according to sizes; and the conveyor belt and the bottle storage boxare arranged for classifying and storing different glass bottles, so that convenience of classifying and recycling the glass bottles is greatly improved.

The invention discloses a gear-type engine oil pump, which comprises a pump body, a pump cover, a driving gear, a driving shaft, a driven gear, a driven shaft and a drive gear which drives the driving gear to rotate. A flange is arranged on the end surface far away from the pump body of the pump cover. The gear-type engine oil pump additionally comprises a hood. The hood is fastened on the flange. The hood and the flange form a cavity which is used for containing the drive gear. A first notch which is used for the chain of the drive gear to penetrate is arranged on the flange. A second notch which is used for containing the hub of the drive gear is arranged on the hood. Since the cavity can isolate the drive gear from engine oil in an oil pan, the situation that the drive gear collides and rubs with the engine oil in the oil pan is avoided to a very great extent, the normal operation of an engine is guaranteed and the service life of the engine is prolonged.