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发明名称
Perfectionnements aux sélecteurs pour les systèmes de téléphonie automatique
摘要
申请公布号
FR825772(A)
申请公布日期
1938.03.14
申请号
FRD825772
申请日期
1937.08.19
申请人
发明人
BETULANDER GOTTHILF ANSGARIUS
分类号
H01H67/12
主分类号
H01H67/12
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