三速 meaning in English

triple-speed

Application of simulated windlass control system from practical ac electrically driven windlass
改交流三速电动锚机为锚机模拟器的探索
Rd speed gear
三速齿轮
In the paper , the structure type of torpedo turbine engine and the three - speed system states of work gas were researched . the work process of torpedo turbine engine was analyzed
本文对鱼雷涡轮机结构类型、鱼雷涡轮机的三速制工况进行了计算研究，对涡轮发动机的工作过程进行了分析。