ballast road
常见例句
- Road bed is the subgrade on which are laid the ballast, ties and rails.
路基就是上面铺着道渣，枕轨和钢轨的底基。 - It springs up a new problem that if there is a new road which can make use of the ballast compatible with the bad environment and ensure safe operation, even reduce the construction cost.
这就在设计、选材等方面提出了一个新的问题，能否充分利用这些废弃石渣，又能适应这种恶劣环境，保障安全运用，还能降低生产成本的新型道路。 返回 ballast road