掘转(o orson §35圆杆在扭转时的变形·刚度条件 (Torsional deformation of circular bars stiffness condition 53-6密圈螺旋弹簧的应力和变形 ( Calculation of the stress and deformation in close-coiled helical springs) §3-7非圆截面杆的扭转 (Torsion of noncircular prismatic bars) D53-8开口和闭合薄壁截面杆的自由扭转 (Free torsion of open and closed thin walled members)(Torsion) §3-8 开口和闭合薄壁截面杆的自由扭转 (Free torsion of open and closed thin￾walled members) §3-5 圆杆在扭转时的变形 ·刚度条件 (Torsional deformation of circular bars & stiffness condition) §3-6 密圈螺旋弹簧的应力和变形 (Calculation of the stress and deformation in close-coiled helical springs) §3-7 非圆截面杆的扭转 (Torsion of noncircular prismatic bars)