Abstract: The disclosure discloses a percussion and cutting composite drilling tool, which relates to the field of drilling equipment and is mainly used to solve the problems of low working efficiency and high wear rate of drill bit existed in breaking rocks only by cutting effect. The main structure comprises a PDC drill bit and a percussion drill bit, which is characterized by a percussion structure directly connected to the percussion drill bit. The disclosure provides a percussion and cutting composite drilling tool, which is suitable for strata under different geological conditions and has higher construction efficiency and lower bit wear.

Abstract: A motor, a power assembly and a power-assisted bicycle are provided. The motor includes a housing, a stator assembly and a busbar assembly. The housing is internally formed with a cavity, and is provided with a wire passing hole. The stator assembly is disposed in the cavity and interference-connected to an inner wall of the housing. The busbar assembly is mounted at one end of the stator assembly in an axial direction, and is provided with a three-phase connection terminal penetrating through the wire passing hole. A resin material is filled between the stator assembly and the housing. The busbar assembly is further provided with a boss base mounted in the wire passing hole in a sealing manner. The three-phase connection terminal is mounted on the boss base.

Abstract: A stator assembly, a motor and a power-assisted bicycle are provided. The stator assembly includes a stator component and a busbar component. The stator component is provided with multiple segmented stator cores and segmented stator windings wound around the segmented stator cores. Each segmented stator winding has two terminals. The busbar component is installed on one end of the stator component along the axial direction. The busbar component is provided with multiple layers of bus bars, which have a plurality of connecting portions. The stator component is also provided with bridge connecting members, which are connected to each of the terminal of at least two segmented stator windings. The connecting portions are connected to the remaining terminals of the stator component in one-to-one correspondence.

Abstract: The present invention discloses a circulating multidimensional liquid chromatography and application thereof. The liquid chromatography comprises an infusion device, a sampling device, a collecting-resampling device, a chromatographic column switching device and a detecting device which are connected sequentially, wherein the collecting-resampling device comprises a collecting valve and a sample ring, and the collecting valve is connected with the sample ring; the sampling device is successively connected with the collecting valve and the chromatographic column switching device; the detecting device is also connected with the collecting valve; and the collecting valve is a three-slot three-position multi-way valve.

Abstract: The present invention discloses a restoration solution for cine film bubble and a restoration method. The restoration solution comprises 100 parts by volume of n-butanol, 60 to 120 parts by volume of lacquer thinner having 5% by mass of ethyl cellulose, 8 to 20 parts by volume of diphenyl isooctyl phosphite, 2 to 10 parts by volume of bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, and 2 to 15 parts by volume of petroleum ether. The present invention integrates micro-restoration, bubble puncture and optical filling, and effectively restores a bubble having a diameter of 0.1 mm to 1 mm generated between a film base layer and an emulsion layer of a cine film. The present invention has advantages of simple method of operation, low cost and good controllability.

Abstract: The present invention discloses a restoration solution for cine film bubble and a restoration method. The restoration solution comprises 100 parts by volume of n-butanol, 60 to 120 parts by volume of lacquer thinner having 5% by mass of ethyl cellulose, 8 to 20 parts by volume of diphenyl isooctyl phosphite, 2 to 10 parts by volume of bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, and 2 to 15 parts by volume of petroleum ether. The present invention integrates micro-restoration, bubble puncture and optical filling, and effectively restores a bubble having a diameter of 0.1 mm to 1 mm generated between a film base layer and an emulsion layer of a cine film. The present invention has advantages of simple method of operation, low cost and good controllability.

Abstract: A shape-restoring device and a restoring method for distorted filmstrips are proposed for restoring filmstrips that are distorted due to vinegar syndrome. During the implementation of the method, the air compressor is started such that pressure reaches 0.6-0.9 MPa; three-way valves are regulated so as to introduce pressure into film-clasping cylinders and pressing-plate cylinders via diverter valves; the cylinder spindles of the film-clasping cylinders move the upper collets fixedly connected therewith, for fixing filmstrips; the cylinder spindles of the pressing-plate cylinders move the pressing plate fixedly connected therewith such that the binding underlay on the lower surface of the pressing plate contacts the heating plate; in this way, pressuring, heating and restoring are carried out. Through steps of pressing, heating, fixing filmstrips, shape-restoring and transporting the distorted filmstrips under the pressure of 0.5-0.8 MPa and the temperature of 80-90° C.

Abstract: A shape-restoring device and a restoring method for distorted filmstrips are proposed for restoring filmstrips that are distorted due to vinegar syndrome. During the implementation of the method, the air compressor is started such that pressure reaches 0.6-0.9 MPa; three-way valves are regulated so as to introduce pressure into film-clasping cylinders and pressing-plate cylinders via diverter valves; the cylinder spindles of the film-clasping cylinders move the upper collets fixedly connected therewith, for fixing filmstrips; the cylinder spindles of the pressing-plate cylinders move the pressing plate fixedly connected therewith such that the binding underlay on the lower surface of the pressing plate contacts the heating plate; in this way, pressuring, heating and restoring are carried out. Through steps of pressing, heating, fixing filmstrips, shape-restoring and transporting the distorted filmstrips under the pressure of 0.5-0.8 MPa and the temperature of 80-90° C.