速度分类 meaning in English

velocity sorting

To design multistage depressed collectors . to classify electrons by their speeds , electrons with high energy are collected by low potential and those with low energy collected by high potential ; to try to avoid second electrons " emission . besides those air pump system was introduced briefly . 4
将电子按速度分类,高电位收集动能小的电子,低电位收集动能大的电子,使收集极几乎不消耗能量,同时尽量避免二次电子的发射,保证行波管的工作稳定性,此外还简单介绍了下气体电动态系统。