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发明名称
CODED TRACK CIRCUIT SIGNALLING SYSTEMS
摘要
申请公布号
CA502074(A)
申请公布日期
1954.05.04
申请号
CAD502074
申请日期
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
J. DONALD HUGHSON
分类号
主分类号
代理机构
代理人
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