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发明名称
Rock drill
摘要
申请公布号
US3130800(A)
申请公布日期
1964.04.28
申请号
US19600060698
申请日期
1960.10.05
申请人
INGERSOLL-RAND COMPANY
发明人
BEAUMONT RICHARD W.
分类号
E21B10/58;E21B17/07
主分类号
E21B10/58
代理机构
代理人
主权项
地址
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