 |
| |||
| 钻孔 | |||
| 螺旋钻孔 | |||
| 螺旋钻孑 | |||
| 螺钻孔 | |||
| |||
| 钻孔; 螺旋钻孔 | |||
| 螺钻孔 | |||
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auger hole : 13 phrases in 5 subjects |
| Agriculture | 3 |
| Architecture | 1 |
| Engineering geology | 2 |
| Hydroelectric power stations | 2 |
| Technology | 5 |
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