I-valve ikwinkqubo yolwelo, esetyenziselwa ukulawula ulwalathiso lolwelo, uxinzelelo, ukuhamba kwesixhobo kukwenza imibhobho kunye nesixhobo esiphakathi (ulwelo, igesi, umgubo) ukuhamba okanye ukumisa kwaye inokulawula isixhobo sayo sokuhamba, ivalve lulawulo olubalulekileyo. icandelo kwinkqubo yokuhambisa ulwelo.AMALUNGISELELO PHAMBI KWE-OPERA...
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