S?c qua ??m ch? n?n th?c hi?n khi b? s?c ??ng chu?n, ? ?i?n ?n ??nh v? khu v?c s?c kh? tho?ng. Kh?ng n?n c?m qua ? chia k?m ch?t l??ng, kh?ng ph? k?n b? s?c v? n?n ki?m tra d?y ngu?n ??nh k? ?? tr?nh n?ng b?t th??ng.
N?i dung tr?n mang t?nh tham kh?o, gi?p b?n c? th?m c? s? ?? ki?m tra xe, ??t c?u h?i v?i ng??i b?n ho?c trao ??i v?i k? thu?t vi?n tr??c khi quy?t ??nh.
