To meet the restriction of the Montreal protocol,a hydrofluorocarbon (HFC) whose ozone depletion potential (ODP) value is zero to replace chlorofluorocarbon (CFC) and hydrochlorofluorocarbon (HCFC) should be looked for.

• 为适应国际上即将禁用CFC和HCFC类物质的迫切要求 ,寻找其替代物成为当务之急。