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发明名称
Flexible piston ring
摘要
申请公布号
US2266742(A)
申请公布日期
1941.12.23
申请号
US19390278433
申请日期
1939.06.10
申请人
THOMPSON PRODUCTS, INCORPORATED
发明人
CRAWFORD FREDERICK C.
分类号
F16J9/06;F16J9/14;F16J9/20
主分类号
F16J9/06
代理机构
代理人
主权项
地址
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