The hardest faults to find are those that happen only Every now and then—intermittent activities. They are often caused by bad connections, dust, Grime, corrosion or simply damaged wiring or connectors.Theo nh? th?ng kê t? s? vé phát hành trong m?t ngày thì t? l? ?? th?ng ???c gi?i ??c ??c c?a x? s? ki?n thi?t s? r?i vào kho?ng one:one.X?