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| instructional material; teaching material; instructional equipment | |||
| teaching aids; educational material; teaching equipment; educational aids; training aid; training materials; training aids | |||
| tutorial paper | |||
| courseware | |||
| tutorial; audio-visual material (das sich optischer u. akustischer Mittel bedient) | |||
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Lehrmaterial : 5 a las frases, 4 temas |
| Finanzas | 1 |
| General | 2 |
| Patentes | 1 |
| Tecnología de la información | 1 |