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发明名称
CENTRALIZED TRAFFIC CONTROL SYSTEM
摘要
申请公布号
CA647007(A)
申请公布日期
1962.08.21
申请号
CAD647007
申请日期
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
WILLIS R. SMITH
分类号
主分类号
代理机构
代理人
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