The piston compressor, the oldest in places such as the cold storage, many central air conditioning unit, and small piston compressor in the fridge and air conditioning.

活塞式压缩机资格最老，用的地方很多如冷库、中央空调机组、还有小型活塞式压缩机用在冰箱和空调中。

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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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In this text, the features of low-temperature air conditioning in the food processing workshop and the difference between ordinary air conditioning and cold storage are explained.

阐述了食品加工车间低温空调的特点及与普通空调和冷库的不同之处，对食品加工车间低温空调的有关问题进行了分析。

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