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The calculation concerns solutions of pressure vessels and their components. The calculation solves deformations and curves of stress in rotational shells loaded with axial force, pressure, radial force and a bending moment. This program is intended for homogeneous shells of identical thickness and a single material. The calculation also enables solutions for connecting two shells of different parameters (thickness, material, dimensions...). The program enables: - Calculation of cylindrical, conical and spherical thin-wall shells. - Calculation of a cylindrical and spherical thick-wall shells. - Calculation of a round plate. - Selection of various loading methods (joint, force, moment, rotational, load with fluid...). - Calculation of deformation, radial shift, moment and stress in any point. - Visualisation of charts with curves of the calculated values. The calculation uses the data, procedures, algorithms and information from the professional literature (Roark formulas, Machinery's Handbook 26th, Teorie desek a skorepin [doc. Ing. Ladislav Subrt, CSc.] and others)