... step QC process before delivery.Material Control, Machining Quality Control, In-coming Material Inspection, Assembly Line Quality Control, Leakage Testing, ... /9(F-32) F=9/5C+2 CEL(°c) FAH(°F)Established in 1998, Ningbo Jiekelong Manufacturing Inc. is located at ... , with convenient transportation by water, land and air. Specialized in development and production of Copper Valves, Gas Valves, Gate Valves ...