Readings present the helpful voltage based upon the common price of samples around a complete amount of intervals of the basic frequency .) b?n l?u ý l?i nh?p li?u. Trong ?i?u ki?n có th? MinhNgoc luôn hi?n ho?c trong m?t kho?n th?i gian nh?t ??nh tr??c khi ?i?u ch?nh, t?t nh?