It reduces the construction difficult, releases the dead load of pullingbar and steel suspension box and saves material.
降低了施工难度，又减轻了拉杆及钢吊箱的自重，节约材料。
2
The author also introduces the arrangement rules of pullingbar, checking computations of shell and pullingbar system at the construction stage and assembly...
重点介绍了拔杆的布置原则，施工阶段网壳和拔杆系统的验算及网壳的拼装与提升等过程。
3
The invention uses the matching of telescopic drawer-bracket and the pullingbar, achieves the purpose of swift installation of steel suspension box pullingbar;