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发明名称
RAILWAY SIGNALING APPARATUS
摘要
申请公布号
CA369839(A)
申请公布日期
1937.11.09
申请号
CAD369839
申请日期
申请人
THE UNION SWITCH AND SIGNAL COMPANY
发明人
JAMES J. VANHORN
分类号
主分类号
代理机构
代理人
主权项
地址
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