The hardest faults to discover are those who transpire only Every now and then—intermittent occasions. They are often because of negative connections, dust, Filth, corrosion or just broken wiring or connectors.Gi?i m?i (bao g?m t?t c? gi?i nào có s? thay ??i, c?p nh?t m?i ho?c ?i?u ch?nh)Other aspects, like line outages and sags or maybe the st