A light pointer is often useful with a slide projector.

光指示器经常与幻灯片放映机一起使用。

I had no screen, so I projected the slides onto an old white sheet.

我没有幕布, 所以我把幻灯片投射到一块旧白床。

This is the cross slide feedscrew and two homemade setscrew collars.

是两岸幻灯片feedscrew两个自制固定衣领。

Said image pair with parallactic information can also be inputted to the computer by scanning equipment or can be formed by adopting computer three-dimensional animation software.

图对合成片5可以制成透明投影片或幻灯片，用作立体图像投影。