The hardest faults to locate are the ones that happen only From time to time—intermittent occasions. They may be because of terrible connections, dust, Filth, corrosion or simply broken wiring or connectors.B??c 3: Gi?i thi?u 123B th??ng cung c?p nhi?u phiên b?n c?a ?ng d?ng, phù h?p v?i các h? ?i?u hành khác nhau nh? Android ho?c iOS.Th?ng