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发明名称
Improvements in louvre ventilators
摘要
申请公布号
GB504639(A)
申请公布日期
1939.04.28
申请号
GB19370030838
申请日期
1937.11.10
申请人
BENJAMIN DONALD HUGHES;GREENWOOD'S VENTILATING COMPANY LIMITED
发明人
分类号
F24F13/15
主分类号
F24F13/15
代理机构
代理人
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