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经营范围
发明名称
An improved ventilator or air extractor
摘要
申请公布号
GB516448(A)
申请公布日期
1940.01.02
申请号
GB19380019039
申请日期
1938.06.27
申请人
JOHN WILLIAM ROONEY
发明人
分类号
B60H1/26
主分类号
B60H1/26
代理机构
代理人
主权项
地址
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