It was established on December 29, 1978, which corresponds to the term all over the world are oil shortage crisis (the second world oil crisis), PTT, it started operations with supply of oil demand in the country, urgent enough. The heavy burden of the delay as a aims to pressure the petroleum supply, PTT from domestic sources, as a result, more countries can Thai energy self-reliance in one level. Discount foreign brand losing money a lot.
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