scaling unit

例句：

1. 1. The elevator has a scaling unit that can adjust the height of the elevator.
   电梯有一个可调节高度的升降单元。
2. 2.The scale factor is used to measure the weight of an object accurately.
   标尺因子用于准确测量物体的重量。
3. 3. The lift has a lifting unit that can raise and lower the floor.
   电梯有一个升降单元，可以升降楼层。