hand-operated switch

例句：

1. 1. The hand-operated switch is easy to use and convenient for people with limited mobility.
   手动操作开关易于使用，对于行动不便的人非常方便。
2. 2.The old man used to operate the hand-operated switch manually every morning.
   那位老人过去每天早上都手动操作手动开关。
3. 3.The engineer had to replace the hand-operated switch after it broke down during a power outage.
   在一次停电事件中，工程师不得不更换了损坏的手动开关。