Ngokohlobo lwezingxenye zokuvala, ama-valve esango avame ukuhlukaniswa abe izinhlobo eziningana ezahlukene, njengokuthi: i-valve yesango eliwumngcele, i-valve yesango elihambisanayo, i-valve yesango eliphindwe kabili, isango lesango eliphindwe kabili, njll. ama-valve esango ahambisanayo.1. Umshado wenduku emnyama...
Funda kabanzi