... frequency, black of oxidation, zincing, nickelage, anode. Machine: CNC engine lathe, milling machine, drilling machine, gear shaper, hobbing machine, ... guarantee excellent workmanship, 2) Small order accepted 3) OEM offered.A:certification: ISO9001:2008.Order requirement: materialkindly offer ... to order qty) 4. Customized size and spec /OEM availableD.Package suitable for sea and air transportation or ...