Combining with the practical research and development of the computer measure and control system, the paper introduces an automatic method to measure the "low-level and wide-range voltage signals".
结合笔者从事计算机测控系统的研发实践，介绍一种测量“低电平宽量程电压信号”的自动测量方法。
So it has wide range of application. Programmable controller (PLC) is the system merging the advantages of computer and industrial control system and it has strong locale adaptability.
可编程序控制器（简称PLC） 是一种集计算机和工业控制系统优点于一身的控制装置， 具有很强的现场适应能力。
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