empty reel造句

As each reel is taken off of the projector, it must be re-wound onto another empty reel.
The projectionist usually uses a separate rewind machine and a spare empty reel, and rewinds the film so it is " head out, " ready to project again for the next show.
The alternative to capstan drive, simply driving the tape takeup reel ( which was used on some cheap tape recorders ), causes problems both with the speed difference between a full and empty reel and with speed variations as described.
Once the changeover has been made, the projectionist unloads the full takeup reel from projector " A, " moves the now-empty reel ( that used to hold the film just unloaded ) from the feed spindle to the takeup spindle, and loads reel # 3 of the presentation on projector " A . " When reel 2 on projector " B " is finished, the changeover switches the live show from projector " B " back to projector " A, " and so on for the rest of the show.
It's difficult to find empty reel in a sentence. 用empty reel造句挺难的