Urea e ka sebelisoa ka bongata e le lisebelisoa tse tala bakeng sa tlhahiso ea melamine, urea formaldehyde resin, hydrazine hydrate, tetracycline, Phenobarbital, caffeine, e fokotsehile sootho BR, phthalocyanine B, phthalocyanine Bx, monosodium glutamate le lihlahisoa tse ling. E na le phello e khanyang ho c...
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