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发明名称
Percussion-type drill
摘要
申请公布号
US3050032(A)
申请公布日期
1962.08.21
申请号
US19600079891
申请日期
1960.12.30
申请人
CAREY MACHINE & SUPPLY, INC.
发明人
CAREY PAUL P.
分类号
E21B4/14
主分类号
E21B4/14
代理机构
代理人
主权项
地址
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