METHOD AND DEVICE FOR ADJUSTEMNT OF AIR FLOW IN MINE VENTILATION SYSTEM,申请号PL19870267736-传众专利搜索

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发明名称	METHOD AND DEVICE FOR ADJUSTEMNT OF AIR FLOW IN MINE VENTILATION SYSTEM
摘要
申请公布号	PL156013(B1)	申请公布日期	1992.01.31
申请号	PL19870267736	申请日期	1987.09.11
申请人		发明人
分类号	E21F;E21F1/00;(IPC1-7):E21F1/00	主分类号	E21F
代理机构		代理人
主权项
地址

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