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发明名称
Verfahren und Vorrichtung zum Abbau von Kohle
摘要
申请公布号
DE901164(C)
申请公布日期
1954.01.07
申请号
DE1944P003526D
申请日期
1944.06.15
申请人
PREUSSISCHE BERGWERKS- UND HUETTEN-AKTIENGESELLSCHAFT
发明人
GREBE KONRAD
分类号
E21C27/46
主分类号
E21C27/46
代理机构
代理人
主权项
地址
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