backed up type roller leveller

例句：

1. 1.The engineer used a backup roller leveler to check the accuracy of his measurements.
   工程师使用备用滚筒水平仪来检查他的测量精度。
2. 2.The construction crew was using a backing roller leveler to ensure the wall was level before painting.
   建筑工人正在使用背压滚筒水平仪来确保墙面平整，以便上漆。
3. 3. The new machine is equipped with a roll-up leveler that can quickly adjust its height for different tasks.
   这款新机器配备了一个卷起的水平仪，可以快速调整高度以适应不同的任务需求。