... : Zinc plating, Nickel plating and chromate plating 3.ISO9001:2008 3/4'' Brass Gate Valve1. Product Introduction Item ... part: precision electronic parts, fasteners, and other jeweler accessories.(3) Main equipments: CNC lathe, Auto-lathe, meter lathe, ... and forging machine, polishing equipment, etc.(4) Main inspection devices: digital projector, Rockwell hardness tester, hydraulic valve test bench ...