The hardest faults to seek out are people who come about only Every now and then—intermittent activities. They may be caused by undesirable connections, dust, dirt, corrosion or simply broken wiring or connectors.Ng??i trúng th??ng ???c u? quy?n cho ng??i khác ??n nh?n th??ng thay mình, nh?ng ph?i có ??y ?? nh?ng gi?y t? theo quy ??nh c?a ph�