Itha kuwotcherera tizigawo tating'ono tating'ono bwino kwambiri, kupanga zolephera zaukadaulo wazowotcherera wachikhalidwe ndi argon arc.
Palibe matenthedwe kupsyinjika, palibe chifukwa pambuyo mankhwala, chilengedwe wochezeka, amene kwambiri bwino kugwirizana mphamvu ndi khalidwe la zilembo zitsulo ndi signboard.
