Terms containing electron counter

Subject	English	Chinese
tech.	electron counter	电子计数管
tech.	electron digital counter	数字电子读数机
tech.	electron-beam counter tube	电子束计数管
tech.	electron-beam counter tube	计数开关管
tech.	electron-collection counter	电子收集计数管
tech.	secondary electron counter	次级电子计数器