Ivalve
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Ivalve yentsimbi engenasici
Ivalve licandelo lolawulo kwinkqubo yokuhanjiswa kolwelo lombhobho.Isetyenziselwa ukutshintsha icandelo lomjelo kunye nolwalathiso lokuhamba okuphakathi.Inemisebenzi yokuguqula, ukunqunyulwa, ukubethelwa, ukutshekisha, ukukhupha okanye ukukhupha uxinzelelo.