Water district customer service representative Cason Gilmer developed the flow restrictor.
水区客户服务代表Cason Gilmer开发了限流器。
英语百科
Flow limiter
（重定向自Flow restrictor）
A flow limiter or flow restrictor is a device to restrict the flow of a fluid, in general a gas or a liquid. Some designs use single stage or multi stage orifice plates to handle high and low flow rates.