| |||
| 养护方法 | |||
|
method of curing : 14 phrases in 5 subjects |
| Architecture | 1 |
| Construction | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Technology | 10 |
| |||
| 养护方法 | |||
|
method of curing : 14 phrases in 5 subjects |
| Architecture | 1 |
| Construction | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Technology | 10 |