I have no idea what subsonic speed is.
我实在不明白什么是亚声速。
The design and test results of the new type high-subsonic speed submerged and semi-submerged intakes for cruise missile propelled by a turbojet engine have been introduced.
本文介绍了以涡轮喷气发动机为动力装置的飞航式战术导弹的一种新型高亚音速嵌入式、半嵌入式进气道的设计与试验研究结果。
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。
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