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发明名称
RAILWAY SWITCH APPARATUS
摘要
申请公布号
CA401548(A)
申请公布日期
1941.12.16
申请号
CAD401548
申请日期
申请人
THE UNION SWITCH AND SIGNAL COMPANY
发明人
KENNETH J. J. MCGOWAN
分类号
主分类号
代理机构
代理人
主权项
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