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经营范围
发明名称
Perfectionnement aux appareils de ventilation
摘要
申请公布号
FR717274(A)
申请公布日期
1932.01.06
申请号
FRD717274
申请日期
1931.05.19
申请人
发明人
STEWART ALEXANDER WILLIAM
分类号
F24F13/065
主分类号
F24F13/065
代理机构
代理人
主权项
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