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| ripple | |||
| hum; phon | |||
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| hem | |||
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| hum | |||
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| hum | |||
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| grunt | |||
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| hum | |||
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哼声 : 40 phrases in 9 subjects |
| Communications | 1 |
| Electronics | 7 |
| General | 14 |
| Information technology | 2 |
| Nautical | 1 |
| Radio | 1 |
| Space | 2 |
| Technology | 10 |
| Telecommunications | 2 |
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