box girder bridge的用法和樣例：
例句
- The successful alternative was the cast-in-place segmental prestressed concrete box girder.
最后采用的方案是分段現澆的預應力混凝土箱形梁。 - It is provided with a telescopic bracket.The box beam at the external side of the telescopic part of the bracket is inserted into the square hole in the main beam.
其中，拖架具有可伸縮功能，是通過(guò)可伸縮部分外側的箱形梁插入貨臺主梁的方孔中，選擇箱形梁上孔的位置來(lái)實(shí)現的。
