It is related to the petrochemical, petroleum, petroleum is starting from oil drilling. Then be processed in refineries and natural gas separation plant has 7 types of raw material: polyester, ethylene, methane thathi lean lean business wathi raphi and business hotel anhydrous benzene watha woven Leu e e and xylene and forwards to the end is the petrochemical industry will act in the history of the 7 types thu do reactions, forming a polymer or plastic beads and event supplies various synthesis and then sent to another company to sell a pellet of plit is used in everyday life to continue.
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