One of the design plans is the bridge tower is steel-encased concrete structure.

其中有一种桥塔设计方案是塔身采用外包钢板混凝土结构。

youdao

One of the design plans is the bridge tower is steel-encased concrete structure.

其中有一种桥塔设计方案是塔身采用外包钢板混凝土结构。

youdao