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Umwanya wa Vacuum
Gupakira Vacuum nuburyo bwo gupakira bukuraho umwuka mubipaki mbere yo kubifunga.Intego yo gupakira vacuum mubusanzwe ni ugukuramo ogisijeni muri kontineri kugirango wongere ubuzima bwibiryo byokurya, kandi ugahitamo uburyo bworoshye bwo gupakira kugirango ugabanye ibirimo nubunini bwibipfunyika.
