 |
| |||
| 回填 (土); 充填 | |||
| 完工后的回填土 | |||
| 回填 | |||
| back fill: 16 phrases in 9 subjects |
| Architecture | 2 |
| Bridge construction | 2 |
| Engineering geology | 4 |
| General | 1 |
| Metallurgy | 1 |
| Nautical | 3 |
| Rowing | 1 |
| Sailing ships | 1 |
| Technology | 1 |
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