pocket type switch

例句：

1. 1. Thenew phone has a pocket-type switch that makes it easy to use.
   这款新手机有一个口袋式开关，使用起来非常方便。
2. 2. The old clock had a pocket-type switch that was difficult to replace.
   旧时钟有一个口袋式开关，很难更换。
3. 3.The engineer used a pocket-type switch to test the circuitry in the device.
   工程师使用了一个口袋式开关来测试设备中的电路。