The hardest faults to find are those that happen only Every now and then—intermittent events. They are often caused by poor connections, dust, Dust, corrosion or simply damaged wiring or connectors.K?t qu? x? s? mi?n B?c trên m?ng c?ng s? ???c c?p nh?t ngay vào lúc 18h15 h?ng ngày b?i t?i các tr??ng quay s? có nhân viên c?a công ty x? s?