Kai LIU

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Huai'an City, CN

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Patents Grantslast 30 patents

Information Patent Grant
Liquid taking device and liquid taking method
- Patent number 11,242,752
- Issue date Feb 8, 2022
- Hongling Ma
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
LIQUID TAKING DEVICE AND LIQUID TAKING METHOD
- Publication number 20200378257
- Publication date Dec 3, 2020
- Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
- Hongling MA
- E21 - EARTH DRILLING MINING