ballast road

常見例句

雙語例句

• Road bed is the subgrade on which are laid the ballast, ties and rails.
  路基就是上面鋪著道渣，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(shè)計、選材等方面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(yīng)這種惡劣環(huán)境，保障安全運用，還能降低生產(chǎn)成本的新型道路。
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