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发明名称
Method of making sheet metal piston rings
摘要
申请公布号
US2311729(A)
申请公布日期
1943.02.23
申请号
US19400326341
申请日期
1940.03.28
申请人
POWER RESEARCH CORPORATION
发明人
BOWERS THOMAS A.
分类号
B23P15/06;F16J9/20
主分类号
B23P15/06
代理机构
代理人
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