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发明名称
Piston ring-groove scraper and groove deepener
摘要
申请公布号
US2018930(A)
申请公布日期
1935.10.29
申请号
US19340754483
申请日期
1934.11.23
申请人
STROMGREN CHARLES D
发明人
STROMGREN CHARLES D.
分类号
F02B77/04
主分类号
F02B77/04
代理机构
代理人
主权项
地址
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