Vavu ya butterfly ndi mtundu wa valavu yomwe imagwiritsa ntchito membala wotsegulira ndi kutseka kuti abwezere pafupifupi 90 ° kuti atsegule, kutseka kapena kusintha kayendedwe ka sing'anga.Valve ya butterfly sikuti imakhala ndi mawonekedwe osavuta, kukula kochepa, kulemera kochepa, kugwiritsa ntchito zinthu zochepa, kuyika pang'ono ...
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