CN207872756U - 螺旋钢管管坯外支撑装置及螺旋钢管成型系统 - Google Patents
螺旋钢管管坯外支撑装置及螺旋钢管成型系统 Download PDFInfo
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- CN207872756U CN207872756U CN201721874396.8U CN201721874396U CN207872756U CN 207872756 U CN207872756 U CN 207872756U CN 201721874396 U CN201721874396 U CN 201721874396U CN 207872756 U CN207872756 U CN 207872756U
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Effective date of registration: 20200921 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Petroleum Equipment Manufacturing Co.,Ltd. Patentee after: China oil steel tube Co.,Ltd. Yangzhou branch Address before: 300457 No. second, No. 83, economic and Technological Development Zone, Binhai New Area, Tianjin Patentee before: CNPC Bohai Petroleum Equipment Manufacturing Co.,Ltd. Patentee before: NORTH CHINA PETROLEUM STEEL PIPE Co.,Ltd. |