2020??2??25???????????ó??????USITC????????????й???ī?????????????????Fabricated Structural Steel???????????????????????????????????й???ī??????????????????????????????????????????????òt????????????????????永???δ????????????????????????????????????ó???????????????????????????????????????????永?????????????????????????漰????Э????????7308.90.3000??7308.90.6000??7308.90.9590???2?????7216.91.0010??7216.91.0090??7216.99.0010??7216.99.0090??7222.40.6000??7228.70.6000??7301.10.0000??7301.20.1000??7301.20.5000??7308.40.0000??7308.90.9530??9406.90.0030???2???????

2019??2??26??????????????Э??the American Institute of Steel Construction Full MemberSubgroup????2019??2??4??????????????????????????????????й???ī????????????????????????????????顣2019??7??8???????????????????????й???ī??????????????????????????????????????????????????????????????á?2019??9??4???????????????????????й???ī??????????????????????????????????????????????????????????????á?2020??1??24???????????????????????й???ī??????????????????????????????????????????й???ī????????????????????????????????????????????????????????????????á?

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