Precision steel hydraulic fitting with plating zinc,We fabricate ... are 100 sets of CNC machines that the precision tolerance control can be +-0.02mm.2,120 ... 2 sets of Vibration bolishing machines,Welding machine and annealing machine.7,Salt spray test machine8,2 sets ... -dimensional measuring machine (new)7,Plating layer thickness gauge8,Many go.no-go pins. Precision steel hydraulic fitting with plating ...