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发明名称
CENTRALIZED RAILWAY TRAFFIC CONTROLLING SYSTEM
摘要
申请公布号
CA365989(A)
申请公布日期
1937.05.11
申请号
CAD365989
申请日期
申请人
THE GENERAL RAILWAY SIGNAL COMPANY
发明人
SEDGWICK N. WIGHT
分类号
主分类号
代理机构
代理人
主权项
地址
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