Pali mitundu yambiri ya ma valve, ndipo iliyonse ili ndi ubwino wake ndi zovuta zake. Nazi zabwino zisanu zazikulu za mavavu ndi zovuta zake, kuphatikizapo ma valve a zipata, ma valve a butterfly, ma valve a mpira, ma valve a globe ndi ma valve. Ndikuyembekeza kukuthandizani. Valve ya tambala: imatanthawuza valavu yozungulira yokhala ndi kutsika ...
Werengani zambiri