For steel plates, this can occur when a thin steel plate is juxtaposed with rigid materials, and the steel may only buckle locally away from the rigid materials.
对于组成钢管的矩形钢板件而言,当其与刚性材料并置时钢板的屈曲仅发生外凸。
Widely USES in the thin steel plate workpiece, professions and so on pipelining, mold service, motor repair, decoration project.