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发明名称
Mining machine having a plurality of dislodging rotors
摘要
申请公布号
US2986385(A)
申请公布日期
1961.05.30
申请号
US19570673470
申请日期
1957.07.22
申请人
JOY MANUFACTURING COMPANY
发明人
DENSMORE NEAL W.
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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