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发明名称
VERFAHREN UND STEUERVORRICHTUNG ZUM LOESEN DES AN BEIDEN STREBENDEN INNERHALB DES STRECKENQUERSCHNITTES ANSTEHENDEN MINERALS MIT HILFE EINER UEBER DIE STREBLAENGE VERFAHRBAREN UND DAS FLOEZ LOESENDEN DOPPELWALZENSCHRAEMMASCHINE
摘要
申请公布号
DE2032996(B2)
申请公布日期
1977.05.05
申请号
DE19702032996
申请日期
1970.07.03
申请人
发明人
分类号
E21C27/02;E21C35/08;E21C35/24;(IPC1-7):E21C35/08
主分类号
E21C27/02
代理机构
代理人
主权项
地址
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