An ABB variable speed drive system is to power the giant fan that generates subsonic wind speeds at Boeing's flagship wind tunnel in Philadelphia.

ABB的一个变速驱动系统正在为波音公司在费城的旗舰风洞的大型风扇提供动力，以制造出次音速风速。

youdao

Using a microcomputer in the wind tunnel instead of conventional SCR drive controlling equipment has been studed in this paper.

本文对用微型计算机取代传统的可控硅驱动控制装置作了初步的探讨。

youdao