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Three factors which cause the potential of Wilson central terminal of an electrocardiograph to be not equal to zero was investigated theoretically. These three factors are correction for a non-equilateral triangle, correction for three resistances which constitute the averaging network and have different values and correction for a definite input impedance 本文从理论上研究了导致心电图机Wilson中心端电势不等于零的三项因素,即非正三角形修正,平均网络电阻不等修正和心电图机输入阻抗有限修正。
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