| |||
| 发动机第四排气行程 | |||
| 四等 | |||
|
fourth order : 18 phrases in 11 subjects |
| Automobiles | 2 |
| Aviation | 1 |
| Desert science | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| Hydroelectric power stations | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Public security | 1 |
| Space | 1 |
| Technology | 5 |
| |||
| 发动机第四排气行程 | |||
| 四等 | |||
|
fourth order : 18 phrases in 11 subjects |
| Automobiles | 2 |
| Aviation | 1 |
| Desert science | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| Hydroelectric power stations | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Public security | 1 |
| Space | 1 |
| Technology | 5 |