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发明名称
Flow device
摘要
申请公布号
US2256704(A)
申请公布日期
1941.09.23
申请号
US19380235470
申请日期
1938.10.17
申请人
MERLA TOOL COMPANY
发明人
CRICKMER CHARLES S.;LANE JOHN J.
分类号
E21B43/12
主分类号
E21B43/12
代理机构
代理人
主权项
地址
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