鋼軌出現裂紋，信號會自動檢測，變成紅色，列車自動停止

來源: 阿方於 2014-07-29 12:15:30 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.