2023??10??30????????HFC?????the American HFC Coalition????????????????????????й???????????????Hydrofluorocarbon Blends???????????飬?????????й????????????????ī???????R-410B??????ī???????????????????????????????????????????????????з???????????永?????????????????3827.61.0000??3827.63.0000??3827.64.0000??3827.65.0000??3827.68.0000??3827.69.0000??

2015??7??16???????????????????й?????????Ｐ??????????????顣2016??6??22???????????????????й?????????Ｐ?????????????????????á?2019??6??18??????????й???????????????3?η??????飬???????2020??5??29???????????й???????R-421A???????HFC???????????????з?????????????????2020??8??19???????????й??????????HFC?????R-32?????????飩??R-125????????飩??R-143a??1,1,1,-???????飩???????????????????????????????Χ????2020??9??28????????????й????R-404A??R-407A??R-407C??R-410A??R-507A/R-507???????????????????????????2021??7??1???????????????????й????????????????????η????????臨????顣2021??11??5???????????????????й?????????????????????η????????臨????????á?

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https://www.federalregister.gov/documents/2023/10/30/2023-23850/hydrofluorocarbon-blends-from-the-peoples-republic-of-china-initiation-of-circumvention-inquiry-on