再び丸 : 電球
> 映画を再生、左右の側
 
An early German cathode tube design. The owner of this tube could float free and alive in the air, without wings, and see through metal cabinets to read the secret papers stacked in coherent layers, inside. However, once this skill became common and available to all, it 失われた a lot of its cache. Now, flying people with xray eyes are considered a bit boorish.