筒壳 meaning in English

barrel shell

Bobbin cases of industrial sewing machines
工业用缝纫机的绕线筒壳体
As for side box girder , the elastic theoretical solution has been introduced . the method is based on stress function and regards side box girder as combine of plate element and shell element . then the force and stress formulae for flanges have been derived
对于边箱式截面主梁，本文介绍了弹性理论解法，基于翼板单元应力函数，将边箱梁视为板单元和筒壳单元的组合体，从弹性力学出发，推导出板中法向应力。