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    Ukadaulo wa Ultraviolet (UV) wopha tizilombo toyambitsa matenda wakhala akuchita nyenyezi m'madzi ndi mpweya m'zaka makumi awiri zapitazi, chifukwa cha kuthekera kwake kupereka chithandizo popanda kugwiritsa ntchito mankhwala owopsa. UV imayimira mafunde omwe amagwera pakati pa kuwala kowoneka ndi x-ray pa electromagnet ...
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