I-valve ye-pneumatic eneendlela ezimbini-yeendlela ezintathu yivalve yokubuyisela umva eneendawo ezimbini kunye namachweba amathathu amaziko omoya.Zininzi iintlobo zazo, kwaye zinokwahlulwa zibe ziivalve zombane, iivalve zolawulo lomoya, iivalve zokulawula umatshini, iivalve zolawulo lwezandla, iivalve zeenyawo njalo njalo...
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