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发明名称
RAILWAY TRAFFIC CONTROLLING SYSTEM
摘要
申请公布号
CA375965(A)
申请公布日期
1938.08.23
申请号
CAD375965
申请日期
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
ARTHUR R. WHITEHORN
分类号
主分类号
代理机构
代理人
主权项
地址
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