screen wiper

例句：

1. 1. The screen wiper on the projector is very effective at removing fingerprints.
   投影仪上的屏幕擦拭器非常有效地去除指纹。
2. 2. The technician used a special screen wiper to clean the lens of the camera.
   技术人员使用一种特殊的屏幕擦拭器来清洁相机的镜头。
3. 3.The movie theater had a screen wiper installed to prevent scratches on the large screen.
   电影院安装了屏幕擦拭器，以防止大屏幕上的刮痕。