Discribes the theory of air refrigerator and its application to train air-conditioning, freezing and cold storage, aircraft air-conditioning and large low temperature environmental laboratory.

主要叙述空气制冷机的原理及其在列车空调、冷冻冷藏、飞机空调和大型低温环境试验室中的应用。

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Secondly, can also electrical equipment on board the aircraft to provide electricity for air-conditioning and other equipment using gas gas source.

其次还可以为飞机上的用电设备提供电力，为空调设备等用气设备提供气源。主要是专业名词比较难，翻译的越简单越好，感谢！

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In last-gen aircraft, high-pressure gas is taken from the engine and transported through bleed valves to the auxiliary power system, which controls air-conditioning, for example.

举个例子，在上一代飞机中，引擎中的高压气通过排除阀到达辅助动力系统，该系统控制着空调设备。

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