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发明名称
Improvements in or relating to methods of making hollow stemmed poppet valves, and the improved valves resulting therefrom
摘要
申请公布号
GB563795(A)
申请公布日期
1944.08.30
申请号
GB19430005634
申请日期
1943.04.08
申请人
THOMPSON PRODUCTS, INCORPORATED
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