2020??1??2??????????????????棬?????????й????????Barium Carbonate??????????η????????臨?????????顣????????????ó??????USITC??????????й??????????????η????????臨?????????????飬???????????з??????????????????????????永???????????????????????????????????????????????????????????????淢???????10???????????????????????????????????2020??2??3?????????????ó????????????????????????2020??3??16???e???????????????????????ó?????????????????

2002??10??25???????????????????й??????????????????????顣2003??10??1??????????????????????й???????????????????????????????永???????????η????????臨????????ú???????2009??3??17????????????永??????????????????????????永???????????η????????臨????????ú???????2015??2??17??????????永?????????????

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????https://www.federalregister.gov/documents/2020/01/02/2019-28039/barium-carbonate-from-china-institution-of-a-five-year-review

https://www.federalregister.gov/documents/2020/01/02/2019-28344/initiation-of-five-year-sunset-reviews