Yufei ZHAO

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Drilling device for surveying front rock-mass intactness of tunnel...
- Patent number 11,585,218
- Issue date Feb 21, 2023
- China Institute of Water Resources and Hydropower Research
- Yujie Wang
- E21 - EARTH DRILLING MINING
Information Patent Grant
Tunnel adaptive lining structure in complex environment and constru...
- Patent number 11,499,427
- Issue date Nov 15, 2022
- China Institute of Water Resources and Hydropower Research
- Xiaogang Wang
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
TUNNEL ADAPTIVE LINING STRUCTURE IN COMPLEX ENVIRONMENT AND CONSTRU...
- Publication number 20220120183
- Publication date Apr 21, 2022
- CHINA INSTITUTE OF WATER RESOURCES AND HYDROPOWER RESEARCH
- Xiaogang Wang
- E21 - EARTH DRILLING MINING
Information Patent Application
DRILLING DEVICE FOR SURVEYING FRONT ROCK-MASS INTACTNESS OF TUNNEL...
- Publication number 20220082020
- Publication date Mar 17, 2022
- CHINA INSTITUTE OF WATER RESOURCES AND HYDROPOWER RESEARCH
- Yujie WANG
- E21 - EARTH DRILLING MINING