elbow joint exerciser

例句：

1. 1. This elbow joint exerciser helps with shoulder mobility.
   这个肘关节锻炼器有助于肩部活动。
2. 2.The doctor prescribed an elbow joint exerciser for my son's recovery.
   医生为我的孙子开了一个肘关节锻炼器来帮助恢复。
3. 3. The elderly patient used the elbow joint exerciser to improve his range of motion.
   这位年长的病患使用肘关节锻炼器来提高他的活动范围。