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Yunsheng founded in 1997 is a professional and special manufacturer, distributor and service company of oilfield down hole equipments and is one of ISO qualified international supplier. With more than ten years' experience in oilfields, we offer a complete range of API sucker rod and couplings. We have 20 production lines, and can offer 1,5000 pieces each monOur company is located in
API T sucker rod coupling
