Breaks of the metro traction substation are important equipments that have frequent mechanical and electrical actions, as a result, they are prone to failure.
地铁牵引变断路器是地铁牵引供电系统的重要设备，地铁牵引变断路器的机械和电气动作频繁，易于发生故障。
Breaks of the metro traction substation are important equipments that have frequent mechanical and electrical actions, as a result, they are prone to failure.
地铁牵引变断路器是地铁牵引供电系统的重要设备，地铁牵引变断路器的机械和电气动作频繁，易于发生故障。
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