... ISO 9001:2008 Standard and non-standard customized OEMSteel Precision Casting/Mining PartsTiming pulley Standard and non-standard. Material: ... of oxidation, zincing, nickelage, anode. Machine: CNC engine lathe, milling machine, drilling machine, gear shaper, hobbing machine, grinder, testing center. Inspection: All ... all kinds of surface treatment. customized OEM Steel Precision Casting/Mining Parts