The toughest faults to find are the ones that take place only Every so often—intermittent situations. They can be caused by lousy connections, dust, Dust, corrosion or simply damaged wiring or connectors.M? th?y ng??i ch?t nh?ng ch?a ch?t là ?i?m gì? Gi?i mã gi?c m? th?y ng??i ch?t nh?ng ch?a ch?t và nh?ng con s? may perhaps m?nCh?i cá c??c