The hardest faults to search out are the ones that occur only once in a while—intermittent occasions. They can be brought on by negative connections, dust, Filth, corrosion or just broken wiring or connectors.Ca?ch ?ô?i ve? tru?ng th???ng x? s? mi?n Nam an toa?n nhâ?t chi?nh la? b?n hãy mang t?? ve? sô? ?o? ?ê?n t?i tru? s?? cu?a nha? ?a?i c