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发明名称
METHOD FOR VINTILATING DEAD WORKINGS AND RELEVANT UNIT
摘要
申请公布号
SU1654588(A1)
申请公布日期
1991.06.07
申请号
SU19894652703
申请日期
1989.02.20
申请人
NOVOCHERKASSKIJ POLT I IM.SERGO ORDZHONIKIDZE
发明人
SERGEEV SERGEJ I,SU;USIK ALEKSANDR G,SU;SHLYAPIN VYACHESLAV G,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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