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论述了天然制冷剂在制冷系统中应用的技术特点以及国际上对天然制冷剂应用研究的现状 ;指出了在制冷系统中应用天然制冷剂应解决的技术问题
The technical characteristics of natural refrigerants used in refrigeration system and the status quo of the research on the application of natural refrigerants in the world are expounded. The technical problems to be solved in applying natural refrigerants in refrigeration systems are pointed out