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介绍制冷剂主要的物理特性、安全性、环境特性等方面的数据,这些制冷剂包括过去广泛使用的、当前普遍使用的以及将来使用的。
Describe the main physical, safety and environmental characteristics of refrigerants, including those that have been widely used in the past, are currently in widespread use, and are currently being used in the future.