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发明名称
Drilling machine
摘要
申请公布号
US3078932(A)
申请公布日期
1963.02.26
申请号
US19570695252
申请日期
1957.11.08
申请人
ROGERS IRON WORKS COMPANY
发明人
NIXON VIRGIL H.
分类号
E21B15/04;E21D9/00
主分类号
E21B15/04
代理机构
代理人
主权项
地址
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