metering injector的用法和樣例：
例句
- In a piezo inline injector, the actuator is built into the injector body very close to the jet needle.
在壓電直列噴油器，驅動(dòng)器內置在噴油器體非常接近射流針。 - It provices pulses of a set duration, so that the injector valve opens and closes, or pulses, very quickly.
噴油器提供脈沖寬度，使噴油器閥門(mén)打開(kāi)和關(guān)閉。
