四机赛瓦石油钻采设备有限公司
Founded in 1992, SJS has focused on developing products for the oil and gas industry by designing and manufacturing high pressure triplex and quintuplex plunger pumps, cementing and fracturing equipment, downhole oil tools (API 11D1 Certification), clutches and brakes (low inertia clutches and brakes, power grip & PO style clutches, WCB brakes (water cooled brake), power take-off clutches and mechanical PTO’S).
Website：http://www.sjs.ServaCorp.com/cn/