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Petroleum & Petrochemical Today
1009-6809
2012 Issue 7
Evaluating Ethylene Feed Economics by Product Processing Value
chen guo zhong
..............page:23-26
Global 500 2012 Has Announced, Sinopec Occupies Fifth Place
wang zuo ; zhang zuo jie ; liu xiao bin
..............page:41-46
guo nei yao wen
..............page:49-49
guo wai yao wen
..............page:50-50