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为不熟悉工程实际的理科学生设计制造了玻璃制扩散泵真空系统实物模型,使其直观地了解真空获得、测量和检漏的工作原理。简述其构造及由此模型可具体理解的内容。
Design and manufacture the physical model of glass diffusion pump vacuum system for the science students unfamiliar with engineering practice to make it intuitively understand the working principle of vacuum acquisition, measurement and leak detection. Briefly describe its structure and the content that can be concretely understood by this model.