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发明名称
Stahlkappenverbindung fuer den Strebausbau im Grubenbetrieb
摘要
申请公布号
DE831088(C)
申请公布日期
1952.02.11
申请号
DE1949P056414
申请日期
1949.09.30
申请人
ALOYS VANWERSCH;PETER VANWERSCH;LUDWIG VANWERSCH
发明人
VANWERSCH ALOYS
分类号
E21D17/086
主分类号
E21D17/086
代理机构
代理人
主权项
地址
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