... copper 2.Technics-Aotuomatic machine 3.ISO9001:2008 No burrs and sharp edges CNC Parts1. Product Introduction Item ... Qingdao Zehan Machinery Manufacturing CO., Ltd.(2) Main products: CNC machining precision parts: valve accessory, brass tube fittings, ... precision electronic parts, fasteners, and other jeweler accessories(3) Main equipments: CNC lathe, Auto-lathe, meter lathe, pressing and ...