... , with convenient transportation by water, land and air. Specialized in development and production of copper valves, gas valves, cast steel ... 22DIN28564.Advantage:(1)Ningbo Jiekelong Precision Manufacturing Co.,Ltd Established in 1998,was totally invested by Ningbo Jintian Copper(Group) ... years rich experience of OEM &ODM.If the order in large quantities,free charge of mould fees.(3)Steady raw material ...