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发明名称
Perfectionnements aux appareils de t.s.f. avec émission et réception combinées
摘要
申请公布号
FR50351(E)
申请公布日期
1940.04.12
申请号
FRD50351
申请日期
1938.10.07
申请人
发明人
MAYR HERMANN
分类号
H04B1/50
主分类号
H04B1/50
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代理人
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