Jul. 30, 2009 (China Knowledge) - China National Petroleum Corp, the country's largest integrated oil and gas enterprise and parent of PetroChina<601857><0857><PTR>, on Tuesday announced that on Jul. 25 it put into operation the 5-million-ton-per-year refinery it contracted to build in Algeria.
The refinery, situated at Skikda in the eastern part of Algeria, is the biggest overs
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