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介绍了一种电子电位差计的工作原理及校验与改变量程的方法，对于了解电子电位差计的结构，熟悉其使用方法有重要的意义。
This paper introduces the working principle of an electronic potentiometer and the method of checking and changing the measuring range. It is of great significance to know the structure of the electronic potentiometer and familiar with its using method.