conveyer idler roller

例句：

1. 1. The conveyor belt is essential for moving heavy materials efficiently.
   输送带对于高效移动重材料至关重要。
2. 2. The conveyor belt has been designed to reduce the risk of accidents during production.
   输送带的设计旨在减少生产过程中发生事故的风险。
3. 3. The conveyor belt is a crucial component in many industrial processes.
   输送带是许多工业过程中的关键组件。