Nkhani Zamalonda
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Kodi mumadziwa bwanji za mbiri ya thovu ya PVC
Pamene maonekedwe a thovu a PVC adayambitsidwa m'ma 1970, adatchedwa "matabwa amtsogolo," ndipo mankhwala awo ndi polyvinyl chloride.Chifukwa cha kufalikira kwa zinthu zolimba za PVC zotsika thovu, zimatha kulowa m'malo mwazinthu zonse zamatabwa.M'zaka zaposachedwa, t...Werengani zambiri
