铁路道岔及其转换设备是铁路线路中至关重要的设施又是轨道中的薄弱环节。
The rail switch and converse equipment are very important, but unfortunately it is a weak link in railway.
其基本功能是转换道岔，锁闭道岔和反映道岔位置和状态。
Its basic function is to convert turnout, turnout and reflect the turnout locked position and status.
道岔转换设备是直接关系到行车安全及运输效率的重要设备。
Switch transaction devices are the important ones to transport safety and efficiency.
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