Montage pour le branchement à quatre fils de deux dispositifs à fréquences porteuses prévus pour le fonctionnement bifilaire sur deux circuits bifilaires
申请公布号:FR897071(A)
申请号:FRD897071
申请日期:1943.08.09
申请公布日期:1945.03.12
分类号:H04J1/04
主分类号:H04J1/04
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