La Liga là m?t trong nh?ng gi?i ??u bóng ?á ???c ??u t? m?nh b?i các ông l?n. Ng??i hâm m? có th? theo dõi ???c nh?ng tr?n ??u h?p d?n v?i ch?t l??ng t?t nh?t.Harmonics are periodic distortions of voltage, current, or electric power sine waves. Harmonics in electrical power distribution systems are sometimes caused by non-linear loads such