Theory: Readings show the efficient voltage according to the normal worth of samples about an entire variety of durations of the fundamental frequencyK?t qu? x? s? mi?n B?c hôm nay th? Ba 12/3, phát tr?c ti?p t? tr??ng quay x? s? Qu?ng Ninh v?i mã hi?u XSQN. K?t qu? XSMB ngày 12/three/2024 s? ???c quay th??ng t? lúc 18h15 - 18h35 phút, b?t ??