| |||
| 墙帽; 墙压顶 | |||
|
wall coping : 15 phrases in 4 subjects |
| Bridge construction | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Technology | 12 |
| |||
| 墙帽; 墙压顶 | |||
|
wall coping : 15 phrases in 4 subjects |
| Bridge construction | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Technology | 12 |