bridge-erection crane

例句：

1. 1. The bridge-erectingcrane was used to lift the heavybeams onto the scaffold.
   桥梁起重机被用来将沉重的梁放到脚手架上。
2. 2. The crane operator carefully lifted theheavy steel beams from the ground.
   起重机操作员小心翼翼地从地上抬起了沉重的钢梁。
3. 3. The construction workers were busy usingthe bridge-erecting craneto move the materials around the site.
   建筑工人正忙于使用桥梁起重机来移动工地上的材料。