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。
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.
本文阐述了准确、迅速地进行低温冲击试验的比较完整的操作技术，对工厂试验室开展此项目具有指导意义。
This article described the operation of the accurate and rapid low temperature impact test. It is instructive for plant laboratory to do this kind of test.
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