Petrochemical & Light industry

Shandong huaneng hengsheng co., LTD

Dezhou detian chemical co., LTD. Tianjin bohai chemical co., LTD. Tianjin alkali plant

Tianjin dagu chemical plant

Shougang qianan coking plant

Yunnan gejiu huangmaoshan chemical plant shengli oilfield bohai oil and hydropower co. LTD

Taixi group co. LTD

China national petroleum corporation

Dagang oilfield company

Tianjin gangpu petroleum equipment co. LTD

Material and equipment corporation of daqing oilfield management bureau, erlian branch, huabei oilfield, petrochina

Qinghai oilfield branch of petrochina

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