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发明名称
Improvements relating to signalling systems for railways
摘要
申请公布号
GB342640(A)
申请公布日期
1931.02.05
申请号
GB19300019553
申请日期
1930.06.27
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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