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发明名称
RAILWAY INTERLOCKING SYSTEM
摘要
申请公布号
CA319824(A)
申请公布日期
1932.02.16
申请号
CAD319824
申请日期
申请人
THE GENERAL RAILWAY SIGNAL COMPANY
发明人
JOHN J. LARKIN
分类号
主分类号
代理机构
代理人
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地址
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