... high-standard technician team 3)strict quality control Copper pipe coupling1.Material: The part showed is made up ... & forging etc. Machining: complete machining such as Machining center, CNC, Lathe, Milling machine,drilling etc. Surface treatment: painting, polishing ... or galvanization etc. Machiningcomplete machining such as Machining center, CNC, Lathe, Milling machine,drilling etc. Size and designAs ...