Theory: Readings clearly show the effective voltage dependant on the average worth of samples more than a whole number of periods of the basic frequency Gi? x? s? mi?n nam l??ng truy c?p trên h? th?ng Sites Minh Ng?c r?t l?n nên các b?n c?n l?u ý m?t s? v?n ?? sau ?? ??m b?o xem tr?c ti?p ?n ??nh nh?t:Th?ng kê t? ??ng c?p nh?t khi k?t thúc b