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发明名称
Verfahren und Vorrichtung zum Abbau steil gelagerter Steinkohlenfloeze
摘要
申请公布号
DE974979(C)
申请公布日期
1961.06.22
申请号
DE1944H004298D
申请日期
1944.03.08
申请人
HAMEL ALBERT
发明人
HAMEL ALBERT
分类号
E21C27/34;E21D15/60;E21D23/08
主分类号
E21C27/34
代理机构
代理人
主权项
地址
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