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本文介绍了一种适用于ＣＯ＿２激光器的气体循环控制系统。该系统所采用的可编程序控制方法和系统结构不仅能够精确地控制激光器的工作气压，而且可以根据激光器不同的工作状态和功率输出，选择不同的混合气分比和换气量。系统所有的参数不仅可以预先设定，也可在激光器运行中方便地进行改变。
This article describes a gas circulation control system suitable for CO2 lasers. The programmable control method and system structure used in the system can not only precisely control the working pressure of the laser, but also can select different mixture ratios and gas exchange rates according to different working states and power outputs of the laser. All parameters of the system can be preset not only, but also can be easily changed while the laser is operating.