◆Gong is made by a resist material, can give a clear tone, and its sound is an effective means for Preventing Collisions at Sea
◆ Inkungu insimbi kwenziwa ngumuntu simelane impahla, anganika ithoni ecacile, lokukhenceza kwaso iyindlela ephumelelayo for Ukuvimbela ukushayisana Olwandle