The thread of sucker rod and coupling are processed by compressing and rolling machine, which can
improve the thread strength and solve the problems of loosing and unscrewing.The thread of sucker rod and coupling are processed by compressing and rolling machine, which can improve the thread strength and solve the problems of loosing and unscrewing. ...Show More
Sino Petroleum Equipment Company,as a dedicated to exporter of oilfield equipment, .is located at Shenzhen city, which owns new high techonology and sparkling culture, the national place of HONGKONG.