Sida soo saaraha waalka, COVNA waxay soo saartaa dhammaan noocyada kala duwan ee valves ee dhuumaha. Sida valve gate, globe valve, kubbadda kubbadda, waalka balanbaalista, valve check iyo wixii la mid ah. Waxaa laga heli karaa koronto ku shaqeeya, sambabada hawada ku shaqeysa oo gacanta lagu rakibay si aad u doorato. Nagala tasho si aad u heshid soljad bilaash ah...
Akhri wax dheeraad ah