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发明名称
VENTILATION SHAFT
摘要
申请公布号
SU1529014(A2)
申请公布日期
1989.12.15
申请号
SU19874321503
申请日期
1987.10.27
申请人
G PI "LENINGRADSKIJ PROMSTROJPROEKT"
发明人
MAMKIN PETR P,SU;SEMENOV OLEG A,SU
分类号
F24F7/04
主分类号
F24F7/04
代理机构
代理人
主权项
地址
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