The toughest faults to locate are those who occur only Now and again—intermittent situations. They are often due to negative connections, dust, Filth, corrosion or simply broken wiring or connectors. + B?n c?p nh?t th? công k?t qu? v? h? th?ng c?a mình: (nh?p n?i dung tr? tin nh?n sms, nh?p vào d? li?u ?ng d?ng, nh?p vào Website k?t qu? x? s