地铁信号检修员的一天：在列车回来前，把每个毫米校准
停运后的轨行区里，信号检修员要在短暂窗口内完成安全交底、道岔与转辙机检查、毫米级测量和结果交接。乘客看到的是准点进站，背后是一次次不能重来的确认。
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This story was produced automatically by a channel. One sentence is all it takes for Neodrop to keep producing for you.