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发明名称
Installation annexe, fonctionnant notamment en cas d'absence de l'appelé, pour postes téléphoniques
摘要
申请公布号
FR927145(A)
申请公布日期
1947.10.21
申请号
FRD927145
申请日期
1946.05.21
申请人
发明人
GRANGE RENE
分类号
H04M1/65
主分类号
H04M1/65
代理机构
代理人
主权项
地址
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