2019-08-02-----2022-11-14 www.sei.com.cn

2017-02-16-----2022-11-12 www.sinopecgroup.com

2019-04-09-----2022-11-07 mmsh.sinopec.com

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2022-07-27-----2022-10-20 xnyq.sinopec.com

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2019-05-21-----2022-08-30 www.segroup.cn

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2022-03-07-----2022-03-07 www.sinopecgroup.com.cn

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2021-12-11-----2021-12-11 sxsy.sinopec.com

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2021-03-21-----2021-11-04 smi.sinopec.com

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2019-06-24-----2019-10-03 www.sinopec-jilin.com

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