Showing 1 - 20 results of 42 for search '"Qin, Yongqing"', query time: 1.03s Refine Results  

Sealing washer

by QIN YONGQING
Year of Publication 13.11.2018
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Patent

Graphite gasket

by QIN YONGQING
Year of Publication 13.11.2018
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Patent

Sealing washer

by QIN YONGQING
Year of Publication 24.11.2017
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Patent