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发明名称
Piston ring
摘要
申请公布号
US2488697(A)
申请公布日期
1949.11.22
申请号
US19440545042
申请日期
1944.07.15
申请人
HASTINGS MANUFACTURING COMPANY
发明人
ACKERMAN VIRGIL D.
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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