Tsarin tasowa ta Holtop ga masu siyayya sun kirkirce su don kiyaye yawa daga sama. Masu kiyaye matakanmu da ma'aikatan kiyaye sama (AHUs) sun shaƙeƙe da kayan amfani na canzawa (VFDs) don kiyaye kyakkyawan sama da shan. Wani mayar da abinci a Europe ya sauya tsarin tasowa, kadauke da rarraba 25% na kewayon kewayo da kara kyakkyawan abincin mutane.
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