| 摘要 |
The invention relates to educational equipment comprising a plurality of information support means (1) having identical dimensions but bearing at least partly different information. According to the invention, each support means (1) takes the form of a board comprising an outer frame (2) into which are inserted, removably and with friction, at least two inner frames (3), into each of which are inserted, removably and with friction, at least two labels (4) bearing the information. |
