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发明名称
Dispositif de silence pour tranmission téléphonique ou télégraphique
摘要
申请公布号
FR1032782(A)
申请公布日期
1953.07.06
申请号
FRD1032782
申请日期
1951.02.16
申请人
SOCIETE FRANCAISE RADIO-ELECTRIQUE
发明人
分类号
H04J3/00
主分类号
H04J3/00
代理机构
代理人
主权项
地址
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