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发明名称
Diffuseur réflecteur de sons
摘要
申请公布号
FR59215(E)
申请公布日期
1954.05.06
申请号
FRD59215
申请日期
1949.04.26
申请人
发明人
ZIEGLER CHARLES
分类号
G10K11/28;H04R1/28
主分类号
G10K11/28
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代理人
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