... copper 2.Technics-Hot punchining,CNC machining 3.ISO9001:2008 Oil and gas pipe fitting1. Product Introduction Item DescriptionNameCNC machining ... equipment, etc.(4) Main inspection devices: digital projector, Rockwell hardness tester, hydraulic valve test bench, micrometer, thread ring gauge and plug ... Xishanqian, Huanxiu Sub-district, Jimo city,Qingdao,Shandong province,China Oil and gas pipe fitting