Harmonics are periodic distortions of voltage, present-day, or energy sine waves. Harmonics in energy distribution methods are sometimes caused by non-linear loads including switched method dc electrical power provides and adjustable speed motor drives.Thái S?n B?c và Thái S?n Nam ??u có ???c nh?ng th?ng l?i t?ng b?ng ? vòng 10 gi?i futsal Hig