A method and apparatus for a vehicle suspension system gas spring. There is a provided a computer platform comprising a processor, a peripheral hardware, a connector device, and a memory. Then, an occurrence situation of a multiple-input switching is analyzed as one delay cause by an analysis unit, based on a determination result by the determination unit and a result of the delay test. The device for varying the flow parameter can be a stator with a plurality of stator blades upstream of the impeller, or a second, counter-rotating axial flow impeller. The semifinished polyacrylate sheet products of the invention may be used in producing sanitary items, such as shower trays and washbasins, preferably by a high-performance shaping process, such as thermoforming.