METHOD OF AND APPARATUS FOR REDUCING DUSTINESS OF AIR CARRIED THROUGH VENTILATION DUCTS, IN PARTICULAR THOSE FOR EXTRACTION OF AIR FROM UNDERGROUND MINE WORKINGS,申请号PL19890280311-传众专利搜索

发明名称	METHOD OF AND APPARATUS FOR REDUCING DUSTINESS OF AIR CARRIED THROUGH VENTILATION DUCTS, IN PARTICULAR THOSE FOR EXTRACTION OF AIR FROM UNDERGROUND MINE WORKINGS
摘要
申请公布号	PL160911(B1)	申请公布日期	1993.05.31
申请号	PL19890280311	申请日期	1989.06.29
申请人		发明人
分类号	E21F5/00;E21F5/16;(IPC1-7):E21F5/16	主分类号	E21F5/00
代理机构		代理人
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