Machining valve body 1.Material: brass 2.Zinc plating, Nickel plating,chromate plating,anodize 3.ISO9001:2008 4.Manufacture Machining Valve Body1. Product ... 4) Main inspection devices: digital projector, Rockwell hardness tester, hydraulic valve test bench, micrometer, thread ring gauge and plug gauge and ... Huanxiu Sub-district, Jimo city,Qingdao,Shandong province,China Machining valve body