Ị MAARA?!?Kedu ihe bụ Insulator Glass?!?Ogologo oge tupu oge ọgbara ọhụrụ nke kọmputa, ekwentị, smartphones, eriri fiber-optic na ịntanetị, nkwurịta okwu eletriki/electronic dị anya bụ nke telegraph na ekwentị.Ka oge na-aga, netwọkụ nke telegraph "open waya"...
GỤKWUO