2021??9??17?????????????????????????????й????й???????????????????????????????????Carbon Steel Butt-Weld Pipe Fittings??????????η????????????臨???????????????????????????????????й??永???????????182.90%??????????????????????й????????永???????????87.30%??????????????????????????永???????????52.25%?????????????????????????永???????????65.81%?????????????????????????永???????????52.60%??????????????????????永?????????Э?????????7307.93.30??

1986??12??12???????????????????????й?????????????????????????????1987??2??10??????????????????????????????????????????1992??7??6??????????????????й???????????????????????????????????????????4?????臨???????2000??1??6???2005??11??21???2011??4??15???2016??8??23???4???????????t????????????????2021??7??1??????????????????棬????????й????й????????????????????????????????????????η????????臨?????????顣

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https://www.federalregister.gov/documents/2021/09/17/2021-20102/certain-carbon-steel-butt-weld-pipe-fittings-from-brazil-japan-taiwan-thailand-and-the-peoples