Abstract: The invention discloses a component box for optimizing screening and taking work, comprising a base, wherein the upper end surface of the base is rotatably connected with supporting columns extending up and down, and the upper end of the supporting column is fixedly connected with the upper and lower sides respectively a temporary storage device, the gathering block is provided with an opening upward receiving groove, and the receiving groove can collect the falling parts In the receiving groove, the inner wall of the front side of the receiving groove is provided with a slideway; the present invention utilizes a downwardly extending spiral pipe with different thicknesses of the falling pipe, and sequentially screens the parts of different specifications, which may cause confusion due to the mobile carrying. The parts are distinguished again.

Abstract: This invention discloses a convenient container for unloading, including a box body (11), and a cargo chamber (13) used for storing cargoes is arranged in the box body (11), and an arc-shaped cavity (49) communicated with the cargo cavity (13) is formed in the right end of the cargo cavity (13), and a rotatable upper door (14) is arranged in the arc-shaped cavity (49), the arc-shaped cavity (49) is provided with a rotatable lower door (15). The invention is simple in structure, convenient to operate and convenient to maintain; the device can automatically convey the cargoes to the right end of the container, so that manual carrying of workers is not needed, the labor intensity is reduced, and the unloading efficiency of cargoes is improved.

Abstract: Provided in the present invention is a vinylidene fluoride copolymer. Same is acquired via a polymerization reaction taking place at conditions of 30-100° C. and 2-7 MPa with vinylidene fluoride, tetrafluoroethylene, and perfluorinated dioxole or C1-4 alkoxy-substituted perfluorinated dioxole as raw materials, with an initiator added into an emulsion consisting of water, fluorinated emulsifier, a chain transfer agent, a pH regulator, and an antifouling agent, and then via steps of separation, purification, refinement, condensation, washing, drying, and granulation, where the molar ratio of vinylidene fluoride, tetrafluoroethylene, and perfluorinated dioxole or C1-4 alkoxy-substituted perfluorinated dioxole is 13-17:2-4:1-3.

Abstract: Provided in the present invention is a vinylidene fluoride copolymer. Same is acquired via a polymerization reaction taking place at conditions of 30-100° C. and 2-7 MPa with vinylidene fluoride, tetrafluoroethylene, and perfluorinated dioxole or C1-4 alkoxy-substituted perfluorinated dioxole as raw materials, with an initiator added into an emulsion consisting of water, fluorinated emulsifier, a chain transfer agent, a pH regulator, and an antifouling agent, and then via steps of separation, purification, refinement, condensation, washing, drying, and granulation, where the molar ratio of vinylidene fluoride, tetrafluoroethylene, and perfluorinated dioxole or C1-4 alkoxy-substituted perfluorinated dioxole is 13-17:2-4:1-3.

Abstract: The present invention provides a low-temperature-resistant fluorine-containing elastomer formed through polymerization of the comonomers: 40-80 mol % 1,1-vinylidene fluoride, 2-10 mol % tetrafluoroethylene, 10-30 mol % perfluoro(alkyl vinyl ether), and 1-10 mol % vulcanization monomer. The present invention further provides a preparation method of the fluorine-containing elastomer. In the present invention, on basis of a large number of experiments, the contents of the comonomers of the fluorine-containing elastomer are adjusted, so that the low temperature performance thereof is significantly improved, and the low-temperature retraction temperature TR-10<?40. Moreover, the rate of the volume change of the fluorine-containing elastomer in methanol decreases, and the oil resistance and the solvent resistance are improved, thereby improving the oil resistant performance and solvent resistant performance of the fluorine-containing elastomer.