前言众所周知,各类无线电整机在使用中。除要求能够达到各项技术性能指标之外,尚需稳定可靠,并要求具有良好的环境适应性能。为此,在整机的环境防护设计中,均要根据其具体的技术条件要求和使用环境的恶劣程度,分别采取许多经实践证明是行之有效的防护措施,概括主要有下 Preface As we all know, all kinds of radio machine in use. In addition to the requirements to achieve the technical performance indicators, but also need to be stable and reliable, and requires good environmental adaptability. Therefore, in the environmental protection design of the whole machine, we must take many protective measures that have been proved to be effective according to their specific technical requirements and the harshness of the use environment, which are summarized as follows