测平器

例句：

1. 1. The engineer used a ruler to measure the length of the wall.
   工程师用直尺测量了墙的长度。
2. 2. The surveyor used a level to check the accuracy of the measurements.
   测量员用水平仪检查测量的准确性。
3. 3. The carpenter used a square to ensure the corners were squared.
   木匠用三角板确保角落是直角的。