短語詞組短語harmonic displacement sequence 諧序harmonic c sequence 和聲模進arithmetic -harmonic mean sequence of numbers 等差harmonic and negative sequence 諧波和負序harmonic sequence numbers 調(diào)和數(shù)列harmonic and negative sequence current 諧波及負序電流third -harmonic zero-sequence voltage 三次諧波零序電壓third harmonic zero -sequence voltage 三次諧波零序電壓negative phase sequence harmonic 逆序諧波 返回 harmonic sequence