短语词组短语cylindrical helical torsion spring 圆柱螺旋扭转弹簧Cylindrical E helical torsion spring 圆柱螺旋扭转弹簧cylindroid helical -coil torsion spring 圆柱螺旋扭转弹簧;圆柱螺旋改变弹簧 返回 helical torsion spring