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| water system n; river system n; drainage system n | |||
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水系 : 61 phrases in 7 subjects |
| Accumulators | 1 |
| Computers | 1 |
| Construction | 3 |
| General | 40 |
| Isolation | 1 |
| Piezoelectric crystals | 1 |
| Technology | 14 |
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