JingKai Bei Road - NO.01, Junziguan industrial-park, Hejian, Hebei, CHINA Cangzhou, Hebei
Hejian Xinlong Drilling Accessories Factory specializes in the designing, manufacturing ,marketing and serving high performance diamond bits, tricone bits drilling tools which used petroleum industry. our size ranging from 2 7/8" to 17 ...
drilling bit, tricone bit/rock bit, use in drilling well, Oil&gas industry