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| 航〔水〕道堵塞 | |||
| 航道堵塞; 槽形砌块; 槽块; 通路砖; 水道堵塞; 玻璃池窑的通路砖; 槽形大块砖 | |||
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channel block : 32 phrases in 8 subjects |
| Aviation | 2 |
| Electronics | 16 |
| Geophysics | 1 |
| Information technology | 6 |
| Mathematics | 1 |
| Space | 1 |
| Technology | 1 |
| Telecommunications | 4 |
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