It may seems like an editing suite. But this machine is for keying in the timecode where you want the subtitle to appear. Luckily Ah Sai film is just 10 minutes. Getting all those in-point and out-point for every line of subtitles for normal feature film is insane!
This is where the etching process begin, I guess the green light is the laser beam. And the projection on the wall is what you get from etching machine. After this process the film will be clean and dry up in another machine.
Close up of the laser beam. If it is a 2 hours feature film, it will take at least 10 hours for etching. Yeah.. It works frame by frame!