OVERPRESSURE CHAMBER FOR ACCOMODATION OF ELECTRIC INSTRUMENTS BEING USED IN UNDERGROUND MINES AND FOR TUNNEL DRIVING,申请号PL19890279236-传众专利搜索

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发明名称	OVERPRESSURE CHAMBER FOR ACCOMODATION OF ELECTRIC INSTRUMENTS BEING USED IN UNDERGROUND MINES AND FOR TUNNEL DRIVING
摘要
申请公布号	PL159796(B1)	申请公布日期	1993.01.29
申请号	PL19890279236	申请日期	1989.05.03
申请人		发明人
分类号	E21F11/00;(IPC1-7):H02B1/28;E21F17/06	主分类号	E21F11/00
代理机构		代理人
主权项
地址

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