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Various plant is erected, the airship flying relatively low, can clearly see the plants below. free upgrade to windows 7 professional windows anytime upgrade,free windows 7 home premium activation keys   This is probably the only city has completed construction of chemical supporting businesses. Ye Feng laughed within herself, steel mills, steel mills light is concerned, nothing compared with the Chemical City, called the Chemical City, in fact, now petrochemical industry did not yet formed, and now the most important is oil refining, extraction of light oil, a lot of cleavage out of the basic raw materials are not even from the development and utilization Come. free upgrade to windows 7 professional windows anytime upgrade,free windows 7 home premium activation keys   Although the maple leaf from future generations, but also for understanding the petrochemical industry is very limited, this is an esoteric discipline. However, a later printing maple leaf ordinary member, which knows so much, but did not eat pork, pig run have not seen it, go to the maple leaf as long as three research institutions, some scratching their heads, specious shit proposal still to those scientists, they will naturally go to study. So a few years, the use of oil as the basic raw material for the chemical study .