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发明名称
Rock drill
摘要
申请公布号
US1918065(A)
申请公布日期
1933.07.11
申请号
US19310553938
申请日期
1931.07.30
申请人
INGERSOLL-RAND COMPANY
发明人
TERRY EDWARD F.
分类号
E21B19/24
主分类号
E21B19/24
代理机构
代理人
主权项
地址
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