Verfahren zur Aufweiterung von Arbeitsebenen,申请号DD19890332555-传众专利搜索

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发明名称	Verfahren zur Aufweiterung von Arbeitsebenen
摘要
申请公布号	DD287752(B5)	申请公布日期	1994.08.18
申请号	DD19890332555	申请日期	1989.09.12
申请人	MITTELDEUTSCHE BERGBAU-VERWALTUNGSGESELLSCHAFT MBH	发明人	KELM, WOLF-DIETRICH, DIPL.-ING.;BRENDEL, HELMUT
分类号	E21C41/26;E21C41/28;(IPC1-7):E21C41/28	主分类号	E21C41/26
代理机构		代理人
主权项
地址

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