Aiming at the speed characteristics test, which is one of important test items of engine test, this paper proposes studies of ac electrical dynamometer and its control system.
本文以发动机测试中一项重要的特性测试项目——速度特性测试为目的，重点研究了交流电力测功机及其控制系统设计。
We can test the electrical characteristics of high speed USB, HDMI and MHL products as well as helping our customers debug board systems, and providing the best solution.
因此，我们不仅能测试高速USB及HDMI/MHL产品的特性，还能帮助客户调试系统，提供解决方案。
The vehicle speed sensor is an important part to monitor the working situation of engine, it is necessary to test the characteristics of the speed sensor.
车速传感器是监测发动机工况的重要部件，对车速传感器的特性加以测试是非常必要的。
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