求翻译：通风机目前的设计绝大多数优先考虑进行相似设计，根据相似设计的原理并结合实际工况要求进行具体设计，在设计过程中校核计算是离心通风机设计过程中一个重要的步骤。目前一般使用计算机软件选型加技术人员的成功经验的模式来进行。是什么意思？

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ventilation machines are now in the vast majority design priority based on a similar design, similar in design theory and reality conditions require a specific design in the design process, and Lieutenant Colonel core computing is centrifugal ventilator in the middle of the design process an importa