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sound pressure level : 48 phrases in 11 subjects |
| Communications | 1 |
| Earth sciences | 9 |
| Electronics | 8 |
| Environment | 8 |
| General | 3 |
| Health care | 3 |
| Medical appliances | 3 |
| Physical sciences | 3 |
| Scientific | 1 |
| Technology | 8 |
| Transport | 1 |
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