Quiang Chen

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Shanghai, CN

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Patents Applicationslast 30 patents

Information Patent Application
Variable Frequency Helmholtz Resonator
- Publication number 20140060961
- Publication date Mar 6, 2014
- MANN+HUMMEL FILTER (SHANGHAI) CO. LTD.
- Quiang Chen
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS