It is described how to measure the pump lift with pressure difference meter.

介绍了用压差测量仪测试水泵扬程的方法。

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This article bring up error questions exist in experiment of potential difference meter of gliding line style, analysis the reason, methods of increasing accuracy was given.

提出滑线式电位差计实验存在误差问题并加以分析，给出了提高精确度的方法。

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The principle and the method of making a special power supply for a small, highly stable potential difference meter are introduced. It finds comprehensive application in college physical experiments.

本文介绍了一种小型高稳定电位差计专用电源的原理及制作方法。该电源在大学物理实验中具有较广泛的使用价值。

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From one meter, two meters, you cannot even see the difference.

CNN: Counterfeiters zoom in on fake Ferraris

In 1927, the men's record for the 100-meter dash was 10.6 seconds and the women's was 12.2, a difference of 15%.

WSJ: Can Female Athletes Compete Against Men? In Shooting, Yes