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发明名称
Piston ring
摘要
申请公布号
US2602715(A)
申请公布日期
1952.07.08
申请号
US19500144660
申请日期
1950.02.17
申请人
PERFECT CIRCLE CORPORATION
发明人
SHIRK JOHN F.
分类号
F16J9/20
主分类号
F16J9/20
代理机构
代理人
主权项
地址
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