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发明名称
Piston ring
摘要
申请公布号
US1749894(A)
申请公布日期
1930.03.11
申请号
US19290396069
申请日期
1929.09.30
申请人
STANFIELD JASPER H
发明人
STANFIELD JASPER H.
分类号
F16J9/14
主分类号
F16J9/14
代理机构
代理人
主权项
地址
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