limiter
/ˈlɪmɪtə(r)/noun
1- a person or thing that limits something, in particular限制者; 限制物。尤指：
1.1
- Electronics a circuit whose output is restricted to a certain range of values irrespective of the size of the input【电子】限幅器。亦称CLIPPER.
1.2
- （亦作 speed limiter）a device that prevents a vehicle from being driven above a specified speed限速器。