他们将热量单位转换成可用的工程单位，作为过程控制器和记录器的输入信号。
They convert units of heat into useable engineering units that serve as input signals for process controllers and recorders.
XY记录器XY记录器接收两路输入信号，并生成以这两个输入为横纵坐标的一张图形或图表。
XY recorders XY recorders accept two inputs and create a chart or graph of one input versus the other.
该数据记录器可让安全人员利用内置键盘和显示器现场输入事件代码。
The data recorder allows security personnel to input incident codes on site with a built-in keypad and display.
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