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发明名称
Submarine drill unit
摘要
申请公布号
US1958041(A)
申请公布日期
1934.05.08
申请号
US19320623733
申请日期
1932.07.21
申请人
INGERSOLL-RAND COMPANY
发明人
HANSEN CHARLES C.
分类号
E21B7/12
主分类号
E21B7/12
代理机构
代理人
主权项
地址
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