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| |||
| 过滤〔渗透，透水〕层 | |||
| 过滤渗透，透水层 | |||
| 过滤床 | |||
| 滤层 | |||
| 渗滤层 | |||
| 过滤层; 滤光层; 滤垫层; 倒滤层 | |||
| 反滤层 | |||
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filter layer : 31 phrases in 10 subjects |
| Computer networks | 1 |
| Drilling | 1 |
| Ecology | 2 |
| Electronics | 9 |
| Hydroelectric power stations | 2 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Refrigeration | 1 |
| Technology | 11 |
| Water resources | 2 |
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