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发明名称
Circuit arrangement for light signals with two clear positions in track route interlocking diagrams
摘要
申请公布号
US2864940(A)
申请公布日期
1958.12.16
申请号
US19560569778
申请日期
1956.03.06
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
HELMERT ROBERT
分类号
B61L25/08
主分类号
B61L25/08
代理机构
代理人
主权项
地址
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