YH

Yongfeng HU

Overall (All Time): #2,673,282 of 4,157,543Top 65%
1
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
11414955 Valve stem of needle throttle valve and method of fabricating the same Pengfei Liu, Hehong WU 2022-08-16