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Wakha wazibuza, ngaba iitreyi zealuminiyam zikhuselekile kwi-oven okanye yindlela nje emfutshane yokuzilungisa ekhitshini engalunganga? Awuwedwa—abantu abaninzi bayazisebenzisa xa bebhaka, besosa, okanye beqandisa. Kodwa ngaba izikhongozeli ze-foil ze-oven zingamelana nobushushu obuphezulu ngokukhuselekileyo?