Jiyuan Zhongzhong Heavy Machinery Manufacture Co., Ltd. is a joint-stock enterprise specialized in the production, trade and export of machinery products. We have advanced production equipment, deep technical force and a strict quality assurance system, which ensures the high-class quality. Our products mainly include Petroleum drilling tools, Pipe dies, Rollers and all kinds of forgings, such as drill collars, non-magnetic drill collars, spiral drill collars, integral spiral blade ...   |