APPARATUS FOR TESTING MINE WORKING ROOFS FOR THEIR STABILITY,申请号PL19990332656-传众专利搜索

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发明名称	APPARATUS FOR TESTING MINE WORKING ROOFS FOR THEIR STABILITY
摘要
申请公布号	PL332656(A1)	申请公布日期	2000.10.23
申请号	PL19990332656	申请日期	1999.04.19
申请人	ORZEPOWSKI STANISLAW	发明人
分类号	E21D21/02;(IPC1-7):E21D21/02	主分类号	E21D21/02
代理机构		代理人
主权项
地址

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