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Yajun WANG
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Haidian District, Beijing, CN
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Patents Grants
last 30 patents
Information
Patent Grant
Method for coal mining without reserving coal pillar and tunneling...
Patent number
11,578,598
Issue date
Feb 14, 2023
Beijing Zhongkuang Innovation Alliance Energy Environment Science Academy
Manchao He
E21 - EARTH DRILLING MINING
Information
Patent Grant
Underground longwall mining method
Patent number
11,578,597
Issue date
Feb 14, 2023
Beijing Zhongkuang Innovation Alliance Energy Environment Science Academy
Manchao He
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
DESIGN METHOD FOR MINE WITHOUT LEAVING COAL PILLAR AND WITHOUT ROAD...
Publication number
20220251952
Publication date
Aug 11, 2022
Beijing Zhongkuang Innovation Alliance Energy Environment Science Academy
Manchao HE
E21 - EARTH DRILLING MINING
Information
Patent Application
METHOD FOR COAL MINING WITHOUT RESERVING COAL PILLAR AND TUNNELING...
Publication number
20220251953
Publication date
Aug 11, 2022
Beijing Zhongkuang Innovation Alliance Energy Environment Science Academy
Manchao HE
E21 - EARTH DRILLING MINING