box beams

常见例句

The successful alternative was the cast-in-place segmental prestressed concrete box girder.
最後採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，是通過可伸縮部分外側的箱形梁插入貨台主梁的方孔中，選擇箱形梁上孔的位置來實現的。