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| 录音磁带 | |||
| 录音带 | |||
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audio tape : 26 phrases in 12 subjects |
| Agriculture | 1 |
| Aviation | 2 |
| Chemistry | 6 |
| Earth sciences | 1 |
| Electronics | 5 |
| Engineering geology | 1 |
| General | 1 |
| Geophysics | 1 |
| Information technology | 3 |
| Multimedia | 2 |
| Project management | 1 |
| Telecommunications | 2 |
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