electric pulley block

例句：

1. 1. The electric pulley is used to lift heavy objects.
   电动滑轮用于提升重物。
2. 2.The electric pulley is a crucial component of the machine.
   电动滑轮是机器的关键部件。
3. 3.The electric pulley is easy to operate and requires minimal maintenance.
   电动滑轮操作简单，维护需求低。