Amava: Ngaphezulu kweminyaka eli-10 yamava ekuveliseni i-sub / hubex \ / aloy tubes
Ukuthumela: Iinketho ezifanelekileyo zempahla yokuhambisa kunye nokuhanjiswa kwemihla ngemihla kubaxumi kumazwe angaphezu kwama-50 kunye nemimandla
Ukupakisha: Sikhetha indlela efanelekileyo yokupakisha ukuqinisekisa ukuba iimveliso zikhuselwe kakuhle.
Ixabiso: Sikuqinisekisa ngeyona nto iphambili.