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发明名称
Dispositif de sécurité pour clés téléphoniques
摘要
申请公布号
FR726541(A)
申请公布日期
1932.05.30
申请号
FRD726541
申请日期
1931.01.22
申请人
SOCIETE DES TELEPHONES ERICSSON
发明人
分类号
H01H21/50
主分类号
H01H21/50
代理机构
代理人
主权项
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