Xu Dong

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Heilongjiang, CN

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Patents Grantslast 30 patents

Information Patent Grant
Method and system for quantitatively evaluating surface roughness o...
- Patent number 11,965,734
- Issue date Apr 23, 2024
- NORTHEAST PETROLEUM UNIVERSITY
- Shansi Tian
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
METHOD AND SYSTEM FOR QUANTITATIVELY EVALUATING SURFACE ROUGHNESS O...
- Publication number 20220057199
- Publication date Feb 24, 2022
- Northeast Petroleum University
- Shansi Tian
- G01 - MEASURING TESTING