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发明名称
Piston ring and method of making same
摘要
申请公布号
US2202899(A)
申请公布日期
1940.06.04
申请号
US19380196631
申请日期
1938.03.18
申请人
THOMPSON PRODUCTS INCORPORATED
发明人
COLWELL ARCHIE T.
分类号
B23P15/08
主分类号
B23P15/08
代理机构
代理人
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