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Asphalt or bitumen - made up of hydrocarbon compound and some natural deposits.
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Asphalt or bitumen - made up of hydrocarbon compound and some natural deposits. It is sticky and in semi liquid state. It may appear in dark brown or black. PTT sells Asphalt AC 60/70, the products that conform to Thai standard certified by governmental agencies.
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- Certificate by government unit e.g. authority of Thailand
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