“主梁”造句

这片建筑还只是仅有主梁的骨架.
The block is still just a skeleton of girders.

由火车装运的所有主梁都安放在平板火车车皮上.
All girders shipped by rail were arranged on a flatbed rail car.

主梁支承着工字梁的横向肋.
The main girders support I - section transverse ribs.