integral ballast bed

• 整体道床

integral ballast bed的用法和样例：

例句

1. With the Ballastless track technology extensive used, the problem of the track on solid bed damage and rectification is paid more and more attention now.
   摘要随着无碴轨道技术的广泛运用，整体道床产生的病害及维修问题也越来越引起重视。