避免因电位差而引起彩板的电化学腐蚀。

Avoiding electrochemistry erosion of colourful plank caused by electrical potential difference.

常用的有电流表，电流表，电压的概念，电桥，电位差计数等。

Commonly used has the galvanometer, the amperemeter, a volt idea, the electric bridge, the potential difference counts and so on.

讨论了用伏特计代替电位差计测电源的电动势和内阻的新方法。

A new method of measuring electromotive force and internal resistance of source using voltmeter instead of potentiometer was studied.

零线带电现象是指测量点处，零线与大地之间存在较明显的电位差。

The electrification of zero line results from the the potential difference between zero line and the earth.

磁片中的磁性区域、电路中的电位差或是铅笔在纸上画出的记号都可以用来代表位元。

Bits can be represented by magnetic regions on disks, voltages in circuitry, or graphite marks made by a pencil on paper.