reel control

例句：

1. 1. The camera has a reel control that allows you to adjust the focus manually.
   这台相机有一个卷筒控制，可以让你手动调整焦点。
2. 2. The boat's engine is controlled by a reel switch on the dashboard.
   船的引擎由仪表板上的卷筒开关控制。
3. 3. The pilot used the reel control to bring the plane back into the air.
   飞行员使用卷筒控制将飞机拉回空中。