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发明名称
Rock drill with blowing device
摘要
申请公布号
US2117810(A)
申请公布日期
1938.05.17
申请号
US19360083210
申请日期
1936.06.03
申请人
CHICAGO PNEUMATIC TOOL COMPANY
发明人
LEAR EARL B.
分类号
E21B21/01
主分类号
E21B21/01
代理机构
代理人
主权项
地址
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