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APEX OILFIELD EQUIPMENT (QINGDAO) CO., LTD. our company is a US joint venture company and industry research and development, manufacturing and sales of oil drilling equipment, the company is headquartered in Qingdao Economic Development Zone, in the Qingdao region has two branches, two division. The company has an independent R & D and manufacturing team and technical service team, the production and sales of various petroleum series products have independent intellectual property rights, and has passed the American Petroleum Institute (API) certification Federer petroleum equipment (Qingdao) Co., Ltd. our company is a US joint venture company and industry research and development, manufacturing and sales of petroleum drilling the equipment, the company is headquartered in Qingdao Economic Development Zone, in the Qingdao region has two branches, two division. The company has an independent R & D and manufacturing team and technical service team, the production and sales of various petroleum series products have independent intellectual property rights, and has passed the American Petroleum Institute (API) certification.