VERFAHREN ZUR BILDUNG VON FITERKRUSTEN BEI SPUELBOHRUNGEN,申请号DD19870304187-传众专利搜索

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发明名称	VERFAHREN ZUR BILDUNG VON FITERKRUSTEN BEI SPUELBOHRUNGEN
摘要
申请公布号	DD301297(A7)	申请公布日期	1992.11.19
申请号	DD19870304187	申请日期	1987.06.26
申请人	VEB BRAUNKOHLENBOHRUNGEN UND SCHACHTBAU WELZOW	发明人	MORGNER PETER;KAHNES HARTMUT;ECKART AXEL;MOELLER GERHARD
分类号	E21B;(IPC1-7):E21B/	主分类号	E21B
代理机构		代理人
主权项
地址

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