ejector

名词 ejector:

1. a person who ousts or supplants someone else
   同义词：ouster
2. a mechanism in a firearm that ejects the empty shell case after firing
   同义词：cartridge ejector

e.jec.tor

n.（名词）
One that ejects, especially a device in a gun that ejects the empty shell after each firing.
退壳器：发射的器具，尤指枪里的装置，在每次开火后排出空弹壳
A device using a jet of water, air, or steam to withdraw a fluid or gas from a space.
喷射器：利用水、空气或蒸汽的喷射流的装置，用于将液体或气体从一个空间排挤出去