机械制冷是依靠机械作用或热力作用，使制冷工质发生状态变化(包括集态变化)，完成制冷循环，并利用工质在低温下的温升或集态变化进行制冷。机械制冷按其实现制冷循环的方式，可分为蒸气制冷和气体制冷两种类型。现代制冷技术主要采用蒸气制冷方法。
... mechanical refining 机械整流器 mechanical refrigeration 机械制冷 mechanical refrigerator 压缩式制冷机 ...
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在早期的机械制冷，易燃的化学物质如氨作为制冷剂。
In the early days of mechanical refrigeration, flammable chemicals such as ammonia were used as refrigerant.
住宅还提供了广泛的交叉通风，因此也没有机械制冷的需要。
Extensive cross ventilation was provided; no mechanical cooling is required.
机械制冷，通常简称为制冷，是一个过程，热量从一个位置使用人造换热系统。
Mechanical refrigeration, often referred to simply as refrigeration, is a process by which heat is removed from a location using a man-made heat-exchange system.
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