... Zinc plating, Nickel plating and chromate plating 3.ISO9001:2008 3/4'' Brass Gate Valve1. Product IntroductionItem DescriptionName ... Zehan Machinery Manufacturing CO., Ltd.(2) Main products: CNC machining precision parts: valve accessory, brass tube fittings, ... jeweler accessories.(3) Main equipments: CNC lathe, Auto-lathe, meter lathe, pressing and forging machine, polishing equipment, etc.(4) Main ...