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发明名称
Piston ring
摘要
申请公布号
US2621990(A)
申请公布日期
1952.12.16
申请号
US19490125744
申请日期
1949.11.05
申请人
ELEMER SZIGETI
发明人
SZIGETI ELEMER
分类号
F16J9/06;F16J9/14
主分类号
F16J9/06
代理机构
代理人
主权项
地址
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