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发明名称
RAILWAY SWITCH APPARATUS
摘要
申请公布号
CA347775(A)
申请公布日期
1935.01.22
申请号
CAD347775
申请日期
申请人
THE UNION SWITCH AND SIGNAL COMPANY
发明人
HERBERT L. BONE
分类号
主分类号
代理机构
代理人
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