pump action

英 美
  • 前托推拉式退壳装弹机构
  • action n.行为;活动;措施;效用;交战;情节;事件;姿态;起诉;机能
  • pump n.泵;抽水机;打气筒;抽水;打气v.打气;唧筒般运动;灌输;抽取;增加;盘问
Noun:
  1. action mechanism in a modern rifle or shotgun; a back and forward motion of a sliding lever ejects the empty shell case and cocks the firearm and loads a new round