郑志同志为本刊寄来十来篇典型电路,这些电路都是从国外杂志摘译并经实验验证过的。正如郑忠同志所说:“他山之石可以击玉。”本着这一思想,本期摘登两幅电路,其他以后酌情选登。 Comrade Zheng Zhi has sent over a dozen typical circuits to our magazine. These circuits have all been extracted from foreign magazines and tested experimentally. As Comrade Zheng Zhong said: “The stone of other hills can hit jade.” In this thought, two circuits were extracted in this issue, and others were selected as appropriate.