API Spec 5dp Friction Welding Drill Pipe O. D. 88.9mm EU G/S AISI 4137h Hebei Shitan Machinery Manufacturing Co., Ltd. API 5dp Oil Drill Pipe O. D. 73mm EU G/S AISI 4137h Hebei Shitan Machinery Manufacturing Co., Ltd. API 5dp Friction Welding Drill Pipe O. D. 73mm EU G/S AISI 4137h Hebei Shitan Machinery Manufacturing Co., Ltd. API Spec 5dp Oil Drill Pipe O. D. 73mm EU G/S AISI 4137h Hebei Shitan Machinery Manufacturing Co., Ltd. API Spec 5dp Friction Welding Drill Pipe O. D. 73mm EU G/S AISI 4137h Hebei Shitan Machinery Manufacturing Co., Ltd. API 5dp Oil Drill Pipe O. D. 60.3mm EU G AISI 4137h Hebei Shitan Machinery Manufacturing Co., Ltd. API 5dp Friction Welding Drill Pipe O. D. 60.3mm EU G AISI 4137h Hebei Shitan Machinery Manufacturing Co., Ltd. API Spec 5dp Oil Drill Pipe O. D. 60.3mm EU G AISI 4137h Hebei Shitan Machinery Manufacturing Co., Ltd. API Spec 5dp Friction Welding Drill Pipe O. D. 60.3mm EU G AISI 4137h Hebei Shitan Machinery Manufacturing Co., Ltd. API Friction Welding Drill Pipe/Drilling Pipe O. D. 139.7mm G105 or S135 Tool Joint AISI 4137h Hebei Shitan Machinery Manufacturing Co., Ltd. <<<3132333435>>>
