ballast road
常见例句
- Road bed is the subgrade on which are laid the ballast, ties and rails.
路基就是上麪鋪著道渣，枕軌和鋼軌的底基。 - 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.
這就在設計、選材等方麪提出了一個新的問題，能否充分利用這些廢棄石渣，又能適應這種惡劣環境，保障安全運用，還能降低生産成本的新型道路。 返回 ballast road