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发明名称
Blowing device
摘要
申请公布号
US2090032(A)
申请公布日期
1937.08.17
申请号
US19360117746
申请日期
1936.12.28
申请人
THE CLEVELAND ROCK DRILL COMPANY
发明人
CURTIS JOHN C.
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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