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发明名称
Rotary drilling machine
摘要
申请公布号
US2000976(A)
申请公布日期
1935.05.14
申请号
US19330681864
申请日期
1933.07.24
申请人
CHICAGO PNEUMATIC TOOL COMPANY
发明人
MITCHELL WILLIAM J.
分类号
E21B3/02
主分类号
E21B3/02
代理机构
代理人
主权项
地址
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