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What are the uses of the Allen screws?
The head of the screw head of the hexagon socket screw is round, and the middle is a concave hexagon。 The hexagon screw is the kind of hexagon that is common to many screw heads。 Hexagon socket screws are often used on machinery。 They mainly have t。。。
Selection of standard material considerations
1. The requirements for standard parts materials in terms of mechanical properties, especially strength; 2. The requirements of working conditions on the corrosion resistance of the material; 3, the working temperature of the material's heat resistan...