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发明名称
Ventilating fan
摘要
申请公布号
US1930794(A)
申请公布日期
1933.10.17
申请号
US19280291216
申请日期
1928.07.09
申请人
B. F. STURTEVANT COMPANY
发明人
FREEMAN ERNEST B.
分类号
F04D25/14
主分类号
F04D25/14
代理机构
代理人
主权项
地址
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