摘要 |
<p>The device (1) has large fields (3, 21-29) including a seating row, where the fields are arranged at a wall in a clear addressable pattern. An illustrating and/or markable board element is attached to the wall by a fastening system (4) such that the board element partially covers the fields, and the fields are separated. The board element and/or the fields are dimensioned such that a content of all seating rows of a training room and/or a class room is readable.</p> |