night-time
| noise indicator
| night time | |
| lab.law. transp. nautic. | período nocturno |
| noise indicator | |
| environ. | indicador de ruido |
| |||
| período nocturno | |||
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night-time : 5 phrases in 4 subjects |
| Communications | 1 |
| Electronics | 2 |
| Environment | 1 |
| Transport | 1 |