CN205918378U - 一种便携式钻机的防跑钻杆夹持器 - Google Patents
一种便携式钻机的防跑钻杆夹持器 Download PDFInfo
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106869855A (zh) * | 2017-04-25 | 2017-06-20 | 中煤科工集团重庆研究院有限公司 | 一种全自动防止瓦斯超限装置 |
CN107083936A (zh) * | 2017-04-25 | 2017-08-22 | 中煤科工集团重庆研究院有限公司 | 自动复位封孔器 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106869855A (zh) * | 2017-04-25 | 2017-06-20 | 中煤科工集团重庆研究院有限公司 | 一种全自动防止瓦斯超限装置 |
CN107083936A (zh) * | 2017-04-25 | 2017-08-22 | 中煤科工集团重庆研究院有限公司 | 自动复位封孔器 |
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Address after: 519000 block a, No.12, Shenghui street, Jinding, high tech Zone, Zhuhai City, Guangdong Province Patentee after: ZHUHAI EGR SPECIAL DRILLING EQUIPMENT Co.,Ltd. Address before: 519000, room 29, 402 middle treasure road, Hengqin Town, Hengqin District, Guangdong, Zhuhai Patentee before: ZHUHAI EGR SPECIAL DRILLING EQUIPMENT 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: 519000 block a, No.12, Shenghui street, Jinding, high tech Zone, Zhuhai City, Guangdong Province Patentee after: Guangdong Engel Geological Equipment Technology Co.,Ltd. Address before: 519000 block a, No.12, Shenghui street, Jinding, high tech Zone, Zhuhai City, Guangdong Province Patentee before: ZHUHAI EGR SPECIAL DRILLING EQUIPMENT Co.,Ltd. |