CN209670946U - 一种地热钻井工程用井口防落物装置 - Google Patents
一种地热钻井工程用井口防落物装置 Download PDFInfo
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Address after: Room 121, 1202, 1203 and 1206, Yizhong Building, 75 Qili Henan Road, Zhengzhou District, Henan Free Trade Experimental Zone, Zhengzhou City, Henan Province, 450000 Patentee after: Henan Wanjiang New Energy Group Co., Ltd Address before: Room 121, 1202, 1203 and 1206, Yizhong Building, 75 Qili Henan Road, Zhengzhou District, Henan Free Trade Experimental Zone, Zhengzhou City, Henan Province, 450000 Patentee before: HENAN WANJIANG NEW ENERGY DEVELOPMENT CO., Ltd. |
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CP01 | Change in the name or title of a patent holder | ||
CP01 | Change in the name or title of a patent holder |
Address after: Room 121, 1202, 1203 and 1206, Yizhong Building, 75 Qili Henan Road, Zhengzhou District, Henan Free Trade Experimental Zone, Zhengzhou City, Henan Province, 450000 Patentee after: Wanjiang New Energy Group Co., Ltd Address before: Room 121, 1202, 1203 and 1206, Yizhong Building, 75 Qili Henan Road, Zhengzhou District, Henan Free Trade Experimental Zone, Zhengzhou City, Henan Province, 450000 Patentee before: Henan Wanjiang New Energy Group Co.,Ltd. |
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