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发明名称
Ventilated piston ring
摘要
申请公布号
US2080898(A)
申请公布日期
1937.05.18
申请号
US19330700805
申请日期
1933.12.04
申请人
PHILLIPS HAROLD P
发明人
PHILLIPS HAROLD P.
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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