rotating arm basin

例句：

1. 1.The robot has a rotating arm that can move objects around the room.
   这个机器人有一个可以移动房间内物体的旋转手臂。
2. 2. The scientist used a rotating arm to collect samples from different parts of the planet.
   科学家使用一个旋转手臂从地球的不同部分收集样本。
3. 3. The engineer designed a rotating arm basin for the factory's wastewater treatment system.
   工程师设计了一个旋转臂式水盆，用于工厂的废水处理系统。