2021??4??26???????????????????????????????????????2021??1??27???????????????й????????????Polytetrafluoroethylene?????PTFE??????????????y???????????й?????????????????????????Ч?????????????????????й??????????????????????????????????????????????????????????????????2637???/???????????????Ч????2022??7??27??????????淢?????????????????永????????????????????永???????????????3904??3907??3910??3916??3917??3918??3919??3920??3921??3922??3923??3924??3925??3926??

2005??10??17??????????????????????й?????????????????????????????????7.78???/????8.50???/?????????????landed value???????????

2011??8??24????????????????й?????????????????????????????2.48???/????3.87???/????????????2017??7??28????????????й??????????????????????????2637???/???????Ч????2022??7??27???2020??6??19???????????????????????????????Gujarat Fluoro chemicals Limited??????????????????????й?????????????????????????顣????й?????????????????伴??????????????????????????????????2021??1??27???????????????????????????????????й???????????????????????????????й???????????????????????????????????????????????????????????????????????????????й?????????????????????????Ч???????????????????????

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https://www.cbic.gov.in/resources//htdocs-cbec/customs/cs-act/notifications/notfns-2021/cs-add2021/csadd25-2021.pdf