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发明名称
RAILWAY SIGNALLING APPARATUS
摘要
申请公布号
CA409068(A)
申请公布日期
1942.12.01
申请号
CAD409068
申请日期
申请人
THE UNION SWITCH AND SIGNAL COMPANY
发明人
CHARLES W. FAILOR
分类号
主分类号
代理机构
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