... Co.,Ltd., funded in 1997,prssently is one of the biggest enterprises producing double protection sucker rod joint inside china ... assets RMB 10,000,000.00 yuan, 150 employees, among them there are 26 engineers, it covers 30000 square meters and ... peru ,argentina ,Kuwait ,india and indonisia .our company has obtained the ISO9001 international Quality Management certificate and API spec 11B Certificate.