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发明名称
Dispositifs transmetteurs d'appels
摘要
申请公布号
FR868230(A)
申请公布日期
1941.12.24
申请号
FRD868230
申请日期
1940.12.20
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
H04M1/23
主分类号
H04M1/23
代理机构
代理人
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