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inverted filter
| protective filter
| inverted filter | |
| bridg.constr. | 倒滤层 |
| el. | 反向过滤器 |
| hydroel.st. | 反滤层 |
| protective filter | |
| eng.geol. | 反滤层; 防护过滤器 |
| |||
| 倒滤层 | |||
| 反向过滤器 | |||
| 反滤层 | |||
| 反向滤池; 反沪层; 反过滤器 | |||
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inverted filter protective filter : 7 phrases in 4 subjects |
| Bridge construction | 1 |
| Engineering geology | 1 |
| Oil / petroleum | 2 |
| Technology | 3 |
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