七划管
九划管
九划数码管 | Wikiwand
You can help our automatic cover photo selection by reporting an unsuitable photo.
https://www.wikiwand.com/zh-hans/%E4%B9%9D%E5%8A%83%E7%AE%A1
十四划管（米字）
十四劃管 | Wikiwand
You can help our automatic cover photo selection by reporting an unsuitable photo.
https://www.wikiwand.com/zh-hant/%E5%8D%81%E5%9B%9B%E6%AE%B5%E6%98%BE%E7%A4%BA%E5%99%A8
辉光管
显像管叠加，会有遮挡问题和体积问题。
