... shafts, pins, special screws & nuts and different kinds of fasteners.And we can do many kinds of ... , nickle plating, blacken, many kinds of anodizing and so on) as our customers' requirement. 2 ... & milling machines, more than 100 autolathing machines and many processing machines, total more than 200 machines. ... the meters for concentricity, surface roughness, hardness and so on. 3.OEM service:We always ...