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发明名称
Piston ring
摘要
申请公布号
US1860025(A)
申请公布日期
1932.05.24
申请号
US19310542163
申请日期
1931.06.04
申请人
GOOD FRANCIS R
发明人
GOOD FRANCIS R.
分类号
F16J9/06;F16J9/20
主分类号
F16J9/06
代理机构
代理人
主权项
地址
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