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Harmonics are periodic distortions of voltage, recent, or ability sine waves. Harmonics in electric power distribution methods will often be brought on by non-linear loads including switched method dc power materials and adjustable speed motor drives.Báo Tuổi Trẻ phát triển Tuổi Trẻ Sao nhằm từng bÆ°á»›c nâng cao chất lượng ná