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发明名称
Separator for use with rock drills
摘要
申请公布号
US2990032(A)
申请公布日期
1961.06.27
申请号
US19580755954
申请日期
1958.08.19
申请人
THOR POWER TOOL COMPANY
发明人
SANDVIG ROBERT L.
分类号
E21B21/07
主分类号
E21B21/07
代理机构
代理人
主权项
地址
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