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发明名称
Automatic feed for cable tool drill
摘要
申请公布号
US2587638(A)
申请公布日期
1952.03.04
申请号
US19450618843
申请日期
1945.09.27
申请人
BUCYRUS-ERIE COMPANY
发明人
MEIER JOHANN H.
分类号
E21B19/08
主分类号
E21B19/08
代理机构
代理人
主权项
地址
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