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发明名称
Perfectionnements aux relais électromagnétiques
摘要
申请公布号
FR723922(A)
申请公布日期
1932.04.18
申请号
FRD723922
申请日期
1931.10.07
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
分类号
B61L1/18
主分类号
B61L1/18
代理机构
代理人
主权项
地址
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