Traffic direction control for coded track circuit signaling systems |
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| 申请号 | US69061946 | 申请日 | 1946-08-15 | 公开(公告)号 | US2617014A | 公开(公告)日 | 1952-11-04 |
| 申请人 | GEN RAILWAY SIGNAL CO; | 发明人 | JUDGE THOMAS J; | ||||
| 摘要 | |||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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