The roof of the exhibition center is a cable tensioned box steel shapebeam structure, and the roof of the reception hall and the conference center are Ishape steel beam structures.
展览大厅的屋面为弧形大跨度拉索焊接箱型钢梁结构，接待厅和会议中心的屋面为工字型钢梁结构。
2
Electromotor ventilation section shape is similar to the Ibeam and H beam.
电机通风用异形钢材是一种机械零件，其断面形状类似工字钢和H型钢。
3
This essay makes quantitative description, taking rectangular section beam and I-shape section beam as examples respectively, in order to eliminate the doubt of students.