Imvelaphi ye-R & D: Kuvavanyo lwesithethi, kuhlala kukho iimeko ezinjengendawo yokusingqongileyo yesayithi yovavanyo, ukusebenza kakuhle kovavanyo oluphantsi, inkqubo yokusebenza entsonkothileyo, kunye nesandi esingaqhelekanga. Ukuze kusonjululwe ezi ngxaki, i-Senioracoustic yaphehlelela ngokukhethekileyo inkqubo yovavanyo yesithethi se-AUDOBUS...
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