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| 不稳定河床 | |||
| 不稳定河床动床 | |||
| 游荡性河槽; 动床; 不稳定河槽; 不稳定航道 | |||
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mobile channel : 15 phrases in 3 subjects |
| Electronics | 7 |
| Space | 5 |
| Telecommunications | 3 |
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