The hardest faults to discover are people who transpire only once in a while—intermittent occasions. They can be caused by poor connections, dust, dirt, corrosion or just damaged wiring or connectors.x? s? hôm nayxsmtsxmtx? s? mi?n trungk?t qu? x? s? mi?n trungkqxsmtxsmt hôm nayx? s? mi?n trung hôm nayx? sô hôm nayB?m ? ?? theo dõi VOH trê