four-end parameter analysis method 四端参数法
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Keep the four method, and the end, access.
守此四法，结局通达。
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Based on the theory of four-end network, the equivalent electric circuit diagrams of the horn are given by using the analogous method between methanical force and electric.
依据四端网络的基本原理，利用力电类比的方法，给出了复合变幅杆的等效电路图；
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