Q1: valve butterfly ndi chiyani?A: Valavu ya butterfly ndi valavu yomwe imagwiritsidwa ntchito kusintha kayendedwe ka madzi ndi kupanikizika, zizindikiro zake zazikulu ndizochepa, kulemera kwake, kapangidwe kosavuta, ntchito yabwino yosindikiza.Mavavu a Gulugufe Amagetsi amagwiritsidwa ntchito kwambiri pochiza madzi, petrochemical, zitsulo, mphamvu yamagetsi ...
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