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....a 35-millimetre slide projector.35毫米的幻灯机You gave me back the projector.你将幻灯机还给我了。Ability to use Callipers, Micrometers , Gauges, Profile Project...
You gave me back the projector.你将幻灯机还给我了。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.There is a new projector in my office.我的办公室里有一架新的幻灯机....