... track rate of track-hold circuit 跟踪 track maintenance section 养路工区 approach control circuit 接近控制电路 ...
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Maximum track irregularity is the evaluate index in emergency maintenance and standard deviation of section track irregularity is the evaluate index in track maintenance machine work.
轨道不平顺最大值用于紧急补修评价指标，区段的标准差用于大型养路机作业的评价指标。
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