The hardest faults to discover are people who occur only once in a while—intermittent gatherings. They can be because of poor connections, dust, Filth, corrosion or simply broken wiring or connectors..) b?n l?u ý l?i nh?p li?u. Trong ?i?u ki?n có th? MinhNgoc luôn Hello?n ho?c trong m?t kho?n th?i gian nh?t ??nh tr??c khi ?i?u ch?nh, t?t nh?t