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发明名称
Schreitender Strebausbau in Verbindung mit Bruchbau
摘要
申请公布号
DE815958(C)
申请公布日期
1951.10.08
申请号
DE1949P034904
申请日期
1949.02.24
申请人
GELSENKIRCHENER BERGWERKS-AKTIEN-GESELLSCHAFT
发明人
BENKEN HEINRICH VAN DEN
分类号
E21D23/06
主分类号
E21D23/06
代理机构
代理人
主权项
地址
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