concrete box beam

• 混凝土箱梁

concrete box beam的用法和样例：

例句

1. Binzhou Yellow River Bridge is a three-tower cable-stayed bridge with prestressed concrete girders.
   摘要滨州黄河大桥主桥是三塔预应力混凝土斜拉桥，主梁为预应力混凝土箱梁。