... .100% Leakage Test. Established in 1998, Ningbo Jiekelong Precision Manufacturing Co.,Ltd is located at Cicheng, Ningbo, with convenient transportation by water ... :(1)Ningbo Jiekelong Precision Manufacturing Co.,Ltd Established in 1998,was totally invested by Ningbo Jintian Copper(Group)Co.,Ltd,which one of "China's ...