Nyob rau lub Rau Hli, tus nqi ntawm urea ua lag luam, uas qhia txog tus nqi ntawm cov khoom xa tuaj, paub tias tsis tshua muaj cov khoom muag ntawm cov tuam txhab urea feem ntau, thiab cov tsheb thauj khoom strain, thiab tus nqi ntawm urea nyob rau lub Rau Hli yog qhov zoo tshaj qhov xav tau, thiab dab tsi. yog daim ntawv tshaj tawm ntawm kev lag luam urea thaum Lub Xya Hli? Ua ntej, nyob rau lub Rau Hli, kev tsom mus rau ...
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