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demonstrator | |||
training aid | |||
coaching aid; teaching aid; coaching aids | |||
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teaching aid |
教 具 : 21 phrases in 12 subjects |
Agriculture | 1 |
Aviation | 1 |
Business | 3 |
Economy | 1 |
Electronics | 2 |
Exhibitions | 1 |
General | 2 |
Management | 1 |
Otorhinolaryngology | 1 |
Technology | 4 |
Telecommunications | 2 |
Textile industry | 2 |