electrostatically focus(s)ed tube

例句：

1. 1. Thenew device uses an electrostatically focused tube to improve the accuracy of its measurements.
   这款新设备使用了静电聚焦管来提高其测量的准确性。
2. 2. In this experiment, we used an electrostatically focused tube to study the behavior of charged particles.
   在这个实验中，我们使用了一个静电聚焦管来研究带电粒子的行为。
3. 3.The researcher found that the electrostatically focused tube was effective in reducing noise interference in the data collection process.
   研究者发现，静电聚焦管在数据收集过程中有效地减少了噪声干扰。