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发明名称
Système téléphonique pour appareils à prépaiement
摘要
申请公布号
FR708704(A)
申请公布日期
1931.07.28
申请号
FRD708704
申请日期
1930.04.07
申请人
COMPAGNIE DES TELEPHONES THOMSON-HOUSTON
发明人
分类号
H04M17/02
主分类号
H04M17/02
代理机构
代理人
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