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发明名称
Piston ring
摘要
申请公布号
US2439546(A)
申请公布日期
1948.04.13
申请号
US19460685471
申请日期
1946.07.22
申请人
MCFALL THURLOW E
发明人
MCFALL THURLOW E.
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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