Nsalu yosawomba, yomwe imadziwikanso kuti nsalu yopanda nsalu, imapangidwa ndi ulusi wolunjika kapena mwachisawawa ndipo ndi m'badwo watsopano wa zida zoteteza chilengedwe, zokhala ndi chinyezi, chopumira, chosinthika, chopepuka, chosayaka, chosavuta kuwola, chosakhala ndi poizoni komanso osakwiyitsa,...
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