Zhaolai Hua

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Method for blocking mine water inrush
- Patent number 11,781,429
- Issue date Oct 10, 2023
- CHINA UNIVERSITY OF MINING & TECHNOLOGY, BEIJING
- Yifan Zeng
- E21 - EARTH DRILLING MINING
Information Patent Grant
Filling bag and sealing method for drilled hole for detection in th...
- Patent number 11,459,849
- Issue date Oct 4, 2022
- CHINA UNIVERSITY OF MINING & TECHNOLOGY, BEIJING
- Yifan Zeng
- E21 - EARTH DRILLING MINING