The toughest faults to uncover are people who transpire only Occasionally—intermittent activities. They are often due to terrible connections, dust, Dust, 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 có ghi t