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发明名称
IMPROVED VENTILATION DUCTING FOR UNDERGROUND PASSAGEWAYS
摘要
申请公布号
GB2194036(B)
申请公布日期
1989.12.06
申请号
GB19870009383
申请日期
1987.04.21
申请人
GORDON * ELLIOTT;STEPHEN * ELLIOTT;FRANK * ELLIOTT
发明人
GORDON * ELLIOTT;STEPHEN * ELLIOTT;FRANK * ELLIOTT
分类号
F16L21/02;F24F13/02
主分类号
F16L21/02
代理机构
代理人
主权项
地址
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