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发明名称
Transducteurs acoustiques à granules
摘要
申请公布号
FR984897(A)
申请公布日期
1951.07.11
申请号
FRD984897
申请日期
1949.04.21
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
SKELTON DENNIS EDWARD
分类号
H04R21/00;H04R21/02
主分类号
H04R21/00
代理机构
代理人
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