approach viaduct的用法和樣例：
例句
- If viaduct approach spans are considered then perhaps the approach piers could be used to anchor the backstays.
如果設計中考慮高架引橋，則引橋的橋墩可用來(lái)錨定后拉索。 - The design of formwork for Hau Hoi Wan Elevated Approach Bridge,Hongkong-Shenzhen Western Corridor is presented.
介紹港深西部通道后海灣高架引橋的模具設計。
