| |||
| 拼合式取土器; 对开式取土勺; 对开式取土器 | |||
|
split spoon : 13 phrases in 4 subjects |
| Bridge construction | 1 |
| Engineering geology | 3 |
| Hydroelectric power stations | 1 |
| Technology | 8 |
| |||
| 拼合式取土器; 对开式取土勺; 对开式取土器 | |||
|
split spoon : 13 phrases in 4 subjects |
| Bridge construction | 1 |
| Engineering geology | 3 |
| Hydroelectric power stations | 1 |
| Technology | 8 |