METHOD OF REDUCING THE RISK OF ROOF BUMPS,申请号PL19910291373-传众专利搜索

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发明名称	METHOD OF REDUCING THE RISK OF ROOF BUMPS
摘要
申请公布号	PL165582(B1)	申请公布日期	1995.01.31
申请号	PL19910291373	申请日期	1991.08.07
申请人	GLOWNY INSTYTUT GORNICTWA	发明人	GOSZCZ ANTONI;KLECZEK ZDZISLAW;MALCZYK ALFRED;BROMEK TADEUSZ
分类号	E21C41/00;E21F17/00;(IPC1-7):E21F17/00	主分类号	E21C41/00
代理机构		代理人
主权项
地址

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