6 ranked institutions
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1 (19)China National Petroleum Corp *CHNCompany
2 (24)PetroChina Co LtdCHNCompany
3 (32)China Petroleum and Chemical Corporation *CHNCompany
4 (140)China National Offshore Oil Corp *CHNCompany
5 (320)PowerChina Huadong Engineering Corp Ltd, ChinaCHNCompany
6 (600)Petrobras, BrazilBRACompany