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经营范围
发明名称
Dustless rock drill
摘要
申请公布号
US1889422(A)
申请公布日期
1932.11.29
申请号
US19290387641
申请日期
1929.08.22
申请人
INGERSOLL-RAND COMPANY
发明人
SHOOK JAMES F.
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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