... area: 1. Hydraulic pressure and pneumatic parts field: valve, fairlead, gear wheel and piston;2. Machine tool parts: sea saw, guiding ... rail, worktable and transmission gear;3. Metallurgy machine parts: the transporting roller for the high ... wheel mould and die-casting mould etc.6. Car components: gear, gear box etc.7. Weave and printing machine parts: roller, axis ...