Electro-pneumatic converter is a kind of equipment that converts electrical signal to pneumatic signal, and is the essential key device in automatic process control system.

电—气转换器是一种完成由电信号到气信号转换的装置，是自动化过程控制系统中不可或缺的关键设备。

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Wall-thickness accuracy of steel tubes rolled on a pilger mill can be improved with the automatic process control system established.

建立工艺过程自动控制系统提高周期轧管机轧制的钢管壁厚精度。

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