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经营范围
发明名称
Underground coal auger machine
摘要
申请公布号
US2698169(A)
申请公布日期
1954.12.28
申请号
US19520282802
申请日期
1952.04.17
申请人
CARDOX CORPORATION
发明人
FAWKES DONALD G.
分类号
E21C25/58
主分类号
E21C25/58
代理机构
代理人
主权项
地址
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