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Zhonghe Steel (Tianjin) Co., Ltd.API Drive Sub Lift Plug Casing Milling Washover Pipe for Drilling Fishing Service
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Dongying Tianrui Petroleum Technology Co., Ltd.API 5CT Tubing and Casing Coupling
Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.API 7K Type Cms-XL Casing Slip for Oilfield Wellhead
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Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.API Hwdp Down Hole Drilling Spiral Drill Pipe Drilling Tool Oilfield Drift Casing Drill Collar
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Dongying Tianrui Petroleum Technology Co., Ltd.