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发明名称
Acoustical correction element
摘要
申请公布号
US2966954(A)
申请公布日期
1961.01.03
申请号
US19570671304
申请日期
1957.07.11
申请人
THE CELOTEX CORPORATION
发明人
SABINE HALE J.
分类号
E04B9/00
主分类号
E04B9/00
代理机构
代理人
主权项
地址
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