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发明名称
Improvements in electric display indicator systems
摘要
申请公布号
GB880078(A)
申请公布日期
1961.10.18
申请号
GB19590043676
申请日期
1959.12.23
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
分类号
B61L25/04;B61L25/06
主分类号
B61L25/04
代理机构
代理人
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