The toughest faults to seek out are those that take place only Now and again—intermittent events. They can be caused by negative 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 tr�