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发明名称
Piston ring
摘要
申请公布号
US2299963(A)
申请公布日期
1942.10.27
申请号
US19380247702
申请日期
1938.12.24
申请人
THOMPSON PRODUCTS, INC.
发明人
CRAWFORD FREDERICK C.;COLWELL ARCHIE T.
分类号
F16J9/06;F16J9/20
主分类号
F16J9/06
代理机构
代理人
主权项
地址
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