 |
| |||
| 径迹结构 | |||
| 追踪式构造; 轨道结构 | |||
|
track structure : 11 phrases in 4 subjects |
| Aviation | 1 |
| Bridge construction | 2 |
| Rail transport | 2 |
| Technology | 6 |
|
| |||
| 径迹结构 | |||
| 追踪式构造; 轨道结构 | |||
|
track structure : 11 phrases in 4 subjects |
| Aviation | 1 |
| Bridge construction | 2 |
| Rail transport | 2 |
| Technology | 6 |