在模拟计算机中，一种由伺服系统构成的运算部件。
In analog computer, an arithmetic unit constructed by a servo system.
开发了一种集合数字计算机、模拟计算机和电动伺服控制系统，面向自动控制类课程的综合教学实验仪器。
A kind of comprehensive experimental instrument, which is combined by a digital computer, an analog computer and an electric driving servo system, was proposed for automatic control teaching.
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