In the light of the several common partial control methods in closed water cycle system, this paper analyzes and compares the hydraulic stability of the controlled part.

针对目前闭式水循环系统的几种常见局部控制方式，进行了被控部分水力稳定性的对比分析。

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By means of an example of controlling the tail gas from the production of arsenic acid, this paper introduced the pretreatment, desulfurization and wastewater closed cycle of the control system.

通过砷酸生产中含硫尾气治理实例，介绍治理系统的预处理、 脱硫及废水封闭循环。

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The experimental analysis of semi-closed cycle numerical control system driven by direct current servomotor shows that it is more precise than the traditional calculation result.

通过一个以直流伺服电机驱动的半闭环数控系统的实验分析，表明比传统的计算结果有更 高的精度和 可靠性。

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