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经营范围
发明名称
Air volume regulator
摘要
申请公布号
US1956829(A)
申请公布日期
1934.05.01
申请号
US19290380475
申请日期
1929.07.24
申请人
ILG ELECTRIC VENTILATING COMPANY
发明人
FRANK JOHN M.
分类号
F04D29/46
主分类号
F04D29/46
代理机构
代理人
主权项
地址
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