CN213654808U - 一种集成钻孔轨迹定位功能的双端堵水器装置 - Google Patents
一种集成钻孔轨迹定位功能的双端堵水器装置 Download PDFInfo
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Effective date of registration: 20220210 Address after: 030024 No. 1, Section 1, xinjinci Road, Wanbailin District, Taiyuan City, Shanxi Province Patentee after: Shanxi Coking Coal Group Co.,Ltd. Patentee after: North China Institute of science and technology Address before: No.806 Xueyuan street, Yanjiao Economic Development Zone, Sanhe City, Langfang City, Hebei Province 065201 Patentee before: NORTH CHINA INSTITUTE OF SCIENCE AND TECHNOLOGY Patentee before: College of disaster prevention technology |
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