... Machining Quality Control, In-coming Material Inspection, Assembly Line Quality Control, Leakage Testing, Final Inspection Before Delivery ... . Specialized in development and production of Copper Valves, Gas Valves, Gate Valves, Ball Valve, Radiator Valve, Stop Valve, ... Check Valve, Bibcock, Angle Valves, Brass Fitting, Copper Fitting,Cast Steel Valves, Stainless Steel Valves, Sanitary Wares, Hose, Water ...