Esimweni sanamuhla sezimboni esisheshayo, ukwethembeka nokuqina yizici ezibalulekile embonini yokuthatha indawo.Siyakuqonda lokho futhi senze ama-valve embulunga yethu asezingeni eliphezulu.Ngokugxila ekuqineni, ekunembeni nasekusebenziseni izinto ezihlukahlukene, amavalvu ethu athembisa ukuguqula amasistimu okulawula ukugeleza kwezimboni.