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发明名称
Tube à rayons électroniques pour enregistrements sonores et analogues
摘要
申请公布号
FR746897(A)
申请公布日期
1933.06.07
申请号
FRD746897
申请日期
1932.12.03
申请人
ALLGEMEINE ELEKTRICITATS-GESELLSCHAFT
发明人
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
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