... .Samples are available. 4.100% Leakage Test. Established in 1998, Ningbo Jiekelong Precision Manufacturing Co.,Ltd is located at Cicheng ... , Ningbo, with convenient transportation by water, land and air. Specialized in ... Co.,Ltd Established in 1998,was totally invested by Ningbo Jintian Copper(Group)Co.,Ltd,which one of "China's Top 500 ...