DEVICE FOR VENTILATION OF FACE AREA OF DEAD-END WORKING,申请号SU19894730741-传众专利搜索

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发明名称	DEVICE FOR VENTILATION OF FACE AREA OF DEAD-END WORKING
摘要
申请公布号	RU1788282(C)	申请公布日期	1993.01.15
申请号	SU19894730741	申请日期	1989.08.16
申请人	DO POLT INSTITUT	发明人	SUKHORUKOV VIKTOR P,SU;MEDVEDEV BORIS I,SU;KUZNETSOV VASILIJ V,SU;TSAPOV GEORGIJ P,SU;TASITS YURIJ P,SU
分类号	E21F1/00	主分类号	E21F1/00
代理机构		代理人
主权项
地址

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