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阻挡违例信号 | |||
通过信号机 | |||
区截信号; 闭塞信号 | |||
交通区段号志; 铁路区截信号; 阻塞信号; 截止信号; 分段信号; 闭锁信号; 区段信号; 通信信号机; 闭塞信号机 | |||
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阻塞〔截止,分段〕信号 |
block signal system : 37 phrases in 7 subjects |
Air defense | 1 |
Communications | 3 |
Economy | 1 |
Electronics | 3 |
Nautical | 1 |
Technology | 21 |
Telecommunications | 7 |