HeJian Solidkey Petroleum Machinery Co., Ltd. specialize in research and development of drilling equipments, we are manufacturing and marketing with senior technical staffs for many years. The structure of our co***ny is flexible so that the process is responsive, high quality, prompt delivery, perfect service.
The world's most cutting-edge design (CAD / CAM, Pre / E computer-aided design) and technology are used in manufacturing system. All process of manufacturing is in line with API specificatio...
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