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发明名称
Hydraulic power transmitter control
摘要
申请公布号
US2255857(A)
申请公布日期
1941.09.16
申请号
US19380233173
申请日期
1938.10.04
申请人
OSMUN FRED N
发明人
OSMUN FRED N.
分类号
E21B29/00
主分类号
E21B29/00
代理机构
代理人
主权项
地址
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