Ru Hua Yuan

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Automatic reversing-reposition rocker arm
- Patent number 8,181,588
- Issue date May 22, 2012
- China National Offshore Oil Corp.
- Zhi Xia Fan
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

Patents Applicationslast 30 patents

Information Patent Application
AUTOMATIC REVERSING-REPOSITION ROCKER ARM
- Publication number 20110094434
- Publication date Apr 28, 2011
- CHINA NATIONAL OFFSHORE OIL CORP
- Zhi Xia Fan
- B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT