Method of strengthening the roof supports in an at-the-longwall mining region just behind the longwall mining front,申请号PL20020352204-传众专利搜索

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发明名称	Method of strengthening the roof supports in an at-the-longwall mining region just behind the longwall mining front
摘要
申请公布号	PL197530(B1)	申请公布日期	2008.04.30
申请号	PL20020352204	申请日期	2002.02.13
申请人	KOMPANIA WEGLOWA SA	发明人	ZAJAC BOGDAN;GRYCMAN JERZY;BARANEK IRENEUSZ;JENDERKO CZESLAW
分类号	E21D11/38	主分类号	E21D11/38
代理机构		代理人
主权项
地址

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