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发明名称
Dispositif réfringent pour ondes sonores
摘要
申请公布号
FR995160(A)
申请公布日期
1951.11.28
申请号
FRD995160
申请日期
1949.09.09
申请人
WESTERN ELECTRIC CO INCORPORATED
发明人
分类号
H04R1/34
主分类号
H04R1/34
代理机构
代理人
主权项
地址
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