trong m?t kho?n th?i gian nh?t ??nh tr??c khi ?i?u ch?nh, t?t nh?t b?n nên dùng ph??ng pháp t? ??ng ho?c xây d?ng hàm ?? ki?m tra v?i d? li?u.The hardest faults to find are those who happen only once in a while—intermittent functions. They may be brought on by negative connections, dust, Filth, corrosion or simply damaged wiring or connect