| |||
| 退水段; 退水肢; 退水曲线 | |||
| |||
| 下段 | |||
| 下节 | |||
|
lowering segment : 3 phrases in 3 subjects |
| Bridge construction | 1 |
| Hydroelectric power stations | 1 |
| Otorhinolaryngology | 1 |
| |||
| 退水段; 退水肢; 退水曲线 | |||
| |||
| 下段 | |||
| 下节 | |||
|
lowering segment : 3 phrases in 3 subjects |
| Bridge construction | 1 |
| Hydroelectric power stations | 1 |
| Otorhinolaryngology | 1 |