aperture tube

例句：

1. 1. The aperture tube is used to control the flowof gases through the system.
   孔管用于控制气体通过系统的流量。
2. 2. The engineerdesigned the aperture tube to fitperfectly into the machine.
   工程师设计了孔管，使其完美地安装在机器中。
3. 3.The aperture tube was used tocollect data from the sensors.
   孔管被用来收集传感器的数据。