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(接上期)(4)替代致冷剂在某些情况下,研发计划必须加速进行,以便满足有日期限制的工业界需要。NIST关于取代氟氯代烃(CFC)致冷剂的替代致冷剂的化学、物理性质的研究计划就属于这种情况。直到80年代,全世界所用的绝大多数致冷剂都由CFC
(Continued) (4) Alternative Refrigerants R & D programs must be expedited in some cases to meet the needs of the industry with a date limit. This is the case with NIST’s research program on the chemical and physical properties of alternative refrigerants to replace chlorofluorocarbon (CFC) refrigerants. Until the 1980s, the vast majority of refrigerants used throughout the world consisted of CFCs