Double concentric cylindrical shell with solid floor and added longitudinals on the pressure tank shell is a very good structural form of new pressure tank.
指出了液舱壳板加纵骨的全实肋板同心双层圆柱壳是一种优良的耐压液舱新型结构型式。
2
The scattering form functions of the single shell and double concentric shells insonified by a normally and obliquely incident plane wave are calculated.