名词 roadbed:

1. a bed supporting a road

roader修路工人,清道夫roadn.路；道路；途径；方法roadcut slope路堑边坡road hierarch道路等级road bed soil路床土Road topology道路拓扑road choosing路径选择road junctionn.三叉路road net work道路网road leveller道路整平机road capacity道路容量,道路通行能力road-mobileadj.铁路机动的

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。
2. The new rail is is being loaded onto the track bed.
   轨道路基上正在装新的铁轨。
3. There is a special tool to impact the road when it is under construction so the base is solid.
   有种特殊的工具可以在道路修筑过程中将路面压紧，因此，路基是结实的。