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History 1988 Success of Oil Exploration History 1991 Completion of Vertical Subsidiary Model History 1991 Challenge to Life Science
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Ulsan Complex Completes Construction of Nine New Petrochemical Plants

In 1991, the Korea Oil Corporation completes construction of nine new petrochemical plants at the Ulsan Complex. This expansion fulfilled the company's ambitions to apply the vertical subsidiary model by adding the production of essential petrochemical products to the business.

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