... low cost 1. Standard: ISO, GB, JIS, DIN, AGMA and non-standard. 2. Material: stainless steel,cast iron,pig iron ... non-ferrous,grey iron,ductile cast iron and so on 3. Surface treatment: Carburizing, hardening and tempering, nitriding, high frequency treatment. ... engine lathe, milling machine, drilling mchine, hobbing machine, grinder, gear shaper. 6. Small order acceptable. 7.make machining service as ...