... machining, polishing, and plating5. All sorts of precision casting parts: marine casting parts, auto parts, machinary casting parts, pump parts, hardware parts6.OEM are welcomed. PROCESSMATERIALSTANDARDSAND CASTINGGreen SandGrey ... 5. Passed ISO 90001. These parts are used in machine assembly, valve &pump parts, auto &motorcycle parts, train & railway parts, marine hardware, construction hardware, ...