... gas cylinder valve 2, ISO Certificated 3, Tolerance:0.005~0.02mm 4, Capacity:0.5~1020mm 5, Delivery:on time lpg gas cylinder valve ... , Anodization, Chemical fim, Powder, Passivation, Sand blasting, Brushing & ploshing etc.3) Processing equipments:CNC machining center, CNC lathe, grinding machine, automatic ...