... ASTM, JIS, BS,NF,GB and so onTolerance Polishing,turning,galvanized, electroplating, spraying, and painting and so on ... roughness Strictly according to customer specifications Surface treatment Polishing,turning,galvanized, electroplating, spraying, and painting and so on ... .Main process Machining,turning,milling,drilling,grinding,boring,stamping,threading, tamping and ...