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发明名称
Dispositif permutateur des gammes de fréquence pour les appareils radio-électriques
摘要
申请公布号
FR830815(A)
申请公布日期
1938.08.10
申请号
FRD830815
申请日期
1937.12.14
申请人
发明人
FILIPPA
分类号
H01F27/00
主分类号
H01F27/00
代理机构
代理人
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