strain tube

例句：

1. 1.The engineer used a strain tube to measure the stress in the material.
   工程师使用拉杆管来测量材料中的应力。
2. 2. The scientist discovered that the strain tube could be used to detect changes in the environment.
   科学家发现拉杆管可以用来检测环境的变化。
3. 3. The construction workers were using strain tubes to reinforce the concrete slab.
   建筑工人正在使用拉杆管来加固混凝土板。