AISI 4145h Heavy Weight Drill Rod/Drill Pipe O. D 101.6mm with API Spec 7-1 Hebei Shitan Machinery Manufacturing Co., Ltd. AISI 4145h Water Well Drilling Heavy Weight Drill Rod/Drill Pipe O. D 101.6mm with API Spec 7-1 Hebei Shitan Machinery Manufacturing Co., Ltd. AISI 4145h Oil Drilling Heavy Weight Drill Rod/Drill Pipe O. D 101.6mm with API Spec 7-1 Hebei Shitan Machinery Manufacturing Co., Ltd. AISI 4145h Oil/Gas/Water Drilling Heavy Weight Drill Rod/Drill Pipe O. D 101.6mm with API Spec 7-1 Hebei Shitan Machinery Manufacturing Co., Ltd. API Spec 7-1 AISI 4145h Heavy Weight Drill Rod/Drill Pipe O. D 88.9mm Hebei Shitan Machinery Manufacturing Co., Ltd. API Spec 7-1 AISI 4145h Water Well Drilling Heavy Weight Drill Rod/Drill Pipe O. D 88.9mm Hebei Shitan Machinery Manufacturing Co., Ltd. API Spec 7-1 AISI 4145h Oil Drilling Heavy Weight Drill Rod/Drill Pipe O. D 88.9mm Hebei Shitan Machinery Manufacturing Co., Ltd. API Spec 7-1 AISI 4145h Oil/Gas/Water Drilling Heavy Weight Drill Rod/Drill Pipe O. D 88.9mm Hebei Shitan Machinery Manufacturing Co., Ltd. AISI 4145h Heavy Weight Drill Rod/Drill Pipe O. D 88.9mm with API Spec 7-1 Hebei Shitan Machinery Manufacturing Co., Ltd. AISI 4145h Water Well Drilling Heavy Weight Drill Rod/Drill Pipe O. D 88.9mm with API Spec 7-1 Hebei Shitan Machinery Manufacturing Co., Ltd. <<<1920212223>>>
