Kuyanda kuti makkampani abelesye babelesi bobile, kweendelezya bobile kwa sodium hydrosulfite. Chakusanguna, ŋanda yakuyobweda zintu yeelede kuba ababelesi basalidwe beendelezya mpawo ibelesye nzila yabantu bobile, akujala zintu zyobile. Chabili, mupati wazyakuula weelede kusinizya mweelwe, bubotu, antoomwe azintu zyeelede...
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