levelling pad

例句：

1. 1.The engineer used a levelling pad to ensure the floor was perfectly level.
   工程师使用水平尺垫来确保地板完全平整。
2. 2.During construction, it's important to use levelling pads to prevent unevenness in the ground.
   在施工期间，使用水平尺垫以防止地面不平整非常重要。
3. 3.The builder carefully placed the levelling pad on the floor to ensure it was level before starting work.
   建筑工人小心地将水平尺垫放在地板上，以确保它水平后才开始工作。