... 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-speed wire rolling mill; 4. Refrigerator ... Car components: gear, gear box etc.7. Weave and printing machine parts: roller, axis, gear and flange;8. Train making ...