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发明名称
Magnéto d'appel téléphonique
摘要
申请公布号
FR55920(E)
申请公布日期
1952.09.09
申请号
FRD55920
申请日期
1944.12.13
申请人
发明人
DUCRUET ARTHUR
分类号
H02K21/14
主分类号
H02K21/14
代理机构
代理人
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