HONGGUANG SONG

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QINGDAO, CN

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Patents Applicationslast 30 patents

Information Patent Application
AIR SPRING
- Publication number 20210003187
- Publication date Jan 7, 2021
- CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE CO., LTD.
- PENG SU
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
NONLINEAR AUXILIARY SPRING, NEW-BELTED DIAPHRAGM AND AIR SPRING
- Publication number 20180058534
- Publication date Mar 1, 2018
- CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE CO., LTD.
- XUEBING LI
- B61 - RAILWAYS