main-line passing through
main-line passing through
主干线通过
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Two or more train routes interlinked on the main line shall be able to select and arrange the routes for trains passing-through by pressing the outmost beginning and end buttons.
3正线上相衔接的两条及两条以上的列车进路，通过按压最外方始端和终端按钮应能完成列车通过进路的选排。
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