| 摘要 |
<p>Disclosed is a glass writing board suitable for projection, composed of a ground glass, a fluorescent layer, a primer layer and a magnetically adsorbable plate. A rough surface of the ground glass faces outwards and a smooth surface thereof is laminated on the fluorescent layer, the back surface of the fluorescent layer is in turn laminated on the primer layer, and the back surface of the primer layer is laminated on the magnetically adsorbable plate.</p> |
