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发明名称
Silencing ventilator for windows
摘要
申请公布号
US1938798(A)
申请公布日期
1933.12.12
申请号
US19310507633
申请日期
1931.01.09
申请人
THE MAXIM SILENCER COMPANY
发明人
BOURNE ROLAND B.
分类号
F16L55/02;F24F7/013;F24F13/24
主分类号
F16L55/02
代理机构
代理人
主权项
地址
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