Zhichun ZHANG

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Taiyuan City, CN

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for automatically polishing butt weld of ultralong large-...
- Patent number 12,350,786
- Issue date Jul 8, 2025
- CHINA RAILWAY NO. 3 ENGINEERING GROUP CO., LTD.
- Depeng Sun
- B24 - GRINDING POLISHING

Patents Applicationslast 30 patents

Information Patent Application
APPARATUS FOR AUTOMATICALLY POLISHING BUTT WELD OF ULTRALONG LARGE-...
- Publication number 20250121473
- Publication date Apr 17, 2025
- China Railway No. 3 Engineering Group Co., Ltd.
- Depeng SUN
- B24 - GRINDING POLISHING