The hardest faults to discover are those who transpire only Every so often—intermittent gatherings. They are often because of negative connections, dust, Filth, corrosion or just broken wiring or connectors.?? h?a thi?t k? b?t m?t, bi?u t??ng s?c nét h?p d?n, kích thích nhu c?u tr?i nghi?m.H?i ??ng x? s? ki?n thi?t mi?n B?c bao g?m 28 ??n v? t