- A+
二，拼 音：bì sai
铁路交通名词：“闭塞”一般是指与外界隔绝的意思。这里说的闭塞是铁路信号的专用名词，是指列车进入区间后，使之与外界隔离起来，区间两端车站都不再向这一区间发车，以防止列车相撞和追尾。闭塞设备即为实现“一个区间（闭塞分区）内，同一时间只允许一列车占用”而设置的铁路区间信号设备。1铁路应用的区间闭塞类型有人工闭塞、半自动闭塞和自动闭塞三类。
bi'se都是四声
【拼音】: bìsè
1、bi 闭第四声
2、se塞第四声
bi sai
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