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发明名称
Perfectionnements apportés aux dispositifs électriques à action retardée
摘要
申请公布号
FR693874(A)
申请公布日期
1930.11.26
申请号
FRD693874
申请日期
1930.04.14
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
分类号
H03K17/288
主分类号
H03K17/288
代理机构
代理人
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