在尽头线上调车时,距线路终端应有(  )m的安全距离。   A.10     B.20     C.30

作者: tihaiku 人气: - 评论: 0
问题 在尽头线上调车时,距线路终端应有(  )m的安全距离。   
选项 A.10     B.20     C.30
答案 A
解析 J293
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  • 位置: 第 85 行
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