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发明名称
Improvements in extractor ventilators
摘要
申请公布号
GB811280(A)
申请公布日期
1959.04.02
申请号
GB19570011432
申请日期
1957.04.08
申请人
GREENWOOD'S AND AIRVAC VENTILATING COMPANY LIMITED;BENJAMIN DONALD HUGHES
发明人
分类号
F24F7/02;F24F13/14
主分类号
F24F7/02
代理机构
代理人
主权项
地址
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