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发明名称
RAILWAY TRAFFIC CONTROLLING APPARATUS
摘要
申请公布号
CA426413(A)
申请公布日期
1945.03.27
申请号
CAD426413
申请日期
申请人
THE UNION SWITCH AND SIGNAL COMPANY
发明人
LLOYD V. LEWIS
分类号
主分类号
代理机构
代理人
主权项
地址
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