... land and air. Specialized in development and production of copper valves, gas valves, cast steel valves, stainless ... Copper2.Specification: 3/8", 1/2", 3/4", 1", 1 1/4", 1 1/2", 2", 2 1/2" 8, 10, 12, 15, 18, 22, ... in 1998,was totally invested by Ningbo Jintian Copper(Group)Co.,Ltd,which one of "China' ... 3)Steady raw material supply:we own Jintian Copper Bar Company, which guarantees product quality,low ...