API Spec 7-1 Heavy Weight Drill Rod/Drill Pipe O. D 139.7mm AISI 4145h Hebei Shitan Machinery Manufacturing Co., Ltd. API 7-1 Oil Heavy Weight Drill Rod/Drill Pipe O. D 127mm AISI 4145h Hebei Shitan Machinery Manufacturing Co., Ltd. API 7-1 Heavy Weight Drill Rod/Drill Pipe O. D 127mm AISI 4145h Hebei Shitan Machinery Manufacturing Co., Ltd. API Spec 7-1 Oil Heavy Weight Drill Rod/Drill Pipe O. D 127mm AISI 4145h Hebei Shitan Machinery Manufacturing Co., Ltd. API Spec 7-1 Heavy Weight Drill Rod/Drill Pipe O. D 127mm AISI 4145h Hebei Shitan Machinery Manufacturing Co., Ltd. API 7-1 Oil Heavy Weight Drill Rod/Drill Pipe O. D 114.3mm AISI 4145h Hebei Shitan Machinery Manufacturing Co., Ltd. API 7-1 Heavy Weight Drill Rod/Drill Pipe O. D 114.3mm AISI 4145h Hebei Shitan Machinery Manufacturing Co., Ltd. API Spec 7-1 Oil Heavy Weight Drill Rod/Drill Pipe O. D 114.3mm AISI 4145h Hebei Shitan Machinery Manufacturing Co., Ltd. API Spec 7-1 Heavy Weight Drill Rod/Drill Pipe O. D 114.3mm AISI 4145h Hebei Shitan Machinery Manufacturing Co., Ltd. API 7-1 Oil Heavy Weight Drill Rod/Drill Pipe O. D 101.6mm AISI 4145h Hebei Shitan Machinery Manufacturing Co., Ltd. <<<3738394041>>>
