Mu makina otumizira madzimadzi, valavu ndi chinthu chofunikira kwambiri chowongolera, chomwe chimakhala ndi ntchito zowongolera, kusokoneza, kutsutsa-kubwerera, kudulidwa, ndi shunt. Valve imagwiritsidwa ntchito kwambiri m'mafakitale ndi anthu. Valavu yotentha kwambiri ndi mtundu womwe umagwiritsidwa ntchito kwambiri m'mavavu. Zolemba zake ...
Werengani zambiri