At the same time, the double functions are shown:one being the treatment of general bar-members and the other, the treatment of thin-wall bar-mem- bers.

该程序具有原始数据准备量小、计算精度较高等优点。同时具有处理普通杆件与薄壁杆件的双重功能。

Thus we give a unified treatment of thin wall bar with open and with closed terminals in elementary theory.

这样就把开口与闭合薄壁截面杆的扭转理论紧密联系起来，建立起自由扭转初等理论的统一观点。