The toughest faults to locate are those that occur only Every now and then—intermittent events. They can be attributable to lousy connections, dust, Dust, corrosion or just damaged wiring or connectors.H?i ??ng x? s? ki?n thi?t mi?n B?c bao g?m 28 ??n v? thành viên, trong ?ó có six ??n v? t? ch?c quay s? chính th?c và c? ??nh hàng tu?n c?