The toughest faults to discover are the ones that come about only From time to time—intermittent occasions. They are often due to bad connections, dust, Dust, corrosion or just broken wiring or connectors.Gi?i m?i (bao g?m t?t c? gi?i nào có s? thay ??i, c?p nh?t m?i ho?c ?i?u ch?nh)(vii) transportation of pupils for just a curricular area jour