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发明名称
RAILWAY SWITCH OPERATING APPARATUS
摘要
申请公布号
CA388434(A)
申请公布日期
1940.04.30
申请号
CAD388434
申请日期
申请人
THE UNION SWITCH AND SIGNAL COMPANY
发明人
JAMES I. GRAMMER
分类号
主分类号
代理机构
代理人
主权项
地址
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