Ⅰ.Mwachidule Mu zomera matenthedwe mphamvu, kachitidwe petrochemical, mkulu-makamaka mamasukidwe akayendedwe mu makampani malasha mankhwala, madzi osakaniza ndi fumbi ndi particles olimba, ndi madzi zikuwononga kwambiri, mavavu mpira ayenera kugwiritsa ntchito zitsulo zolimba losindikizidwa mavavu mpira, kotero kusankha zitsulo zoyenera molimba- mavavu osindikizidwa a mpira.The...
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