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【多选题】
色灯信号机应采用信号机,在下列处所可采用矮型信号机是()。
A.
不办理通过列车的到发线上的出站、发车进路信号机
B.
道岔区内的调车信号机及驼峰调车场内的线束调车信号
C.
正线咽喉区内的调车信号机
D.
自动闭塞区段,隧道内的通过信号机
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was new and in good shape
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A.
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【单选题】液体在管道中存在两种流动状态, 时惯性力起主导作用。
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