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发明名称
Mining apparatus
摘要
申请公布号
US3269776(A)
申请公布日期
1966.08.30
申请号
US19610160783
申请日期
1961.12.20
申请人
JEFFREY GALION MANUFACTURING COMPANY
发明人
MUNGER FAY E.
分类号
E21C27/22
主分类号
E21C27/22
代理机构
代理人
主权项
地址
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