节流器 meaning in English

choke holder
current regulator
reducer
restriction chock
restriction choke

The gasoline detection system consists of a capillary restriction .
汽油检测系统由毛细管节流器组成。
A fuel too volatile for the outside temperature, or a missing restrictor in the vapor line, will also cause improper engine idling .
就外界温度而言，燃油的挥发性过高，或蒸汽管路中的节流器有故障，也会使发动机的怠速不稳。
Air operated throttle motor
风动节流器
Exhaust shutter valve
排气节流器