开启箱顶排气阀可使工作室温之冷空气得以对流交换，温度控制采用数字显示仪表自动恒温调节。
The cold air in the working chamber can convent if the exhaust valve on top of the oven is open, the temperature is controlled constant automatically by digital display instrument.
利用可编程序控制器实现仪表回路的PID调节控制。
PID regulation in instrumentation circuit is realized by using program logic controller.
控制管路：用来实现液压元件的控制或调节以及与检测仪表相连接的管路。
Control line: used to achieve the control or adjustment of hydraulic components, as well as the detection instrument connected to the pipeline.
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