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发明名称
Method of and means for the winning of coal or the like
摘要
申请公布号
GB792450(A)
申请公布日期
1958.03.26
申请号
GB19550013362
申请日期
1955.05.09
申请人
GEWERKSCHAFT EISENHUTTE WESTFALIA
发明人
分类号
E21C27/46
主分类号
E21C27/46
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代理人
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