slope indicator tube

例句：

1. 1.The slope indicator tube is used to measure the angle of the slope.
   坡度指示管用于测量斜坡的角度。
2. 2. The engineer used the slope indicator tube to check the stability of the slope.
   工程师使用坡度指示管来检查斜坡的稳定性。
3. 3. The slope indicator tube was installed at the base of the slope to provide accurate measurements.
   在斜坡底部安装坡度指示管以提供准确的测量结果。