| |||
| ★ 交替码 | |||
| 备用代码 | |||
| 成对不等性码 | |||
|
alternate code : 10 phrases in 5 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Information technology | 2 |
| Oil / petroleum | 2 |
| Telecommunications | 4 |
| |||
| ★ 交替码 | |||
| 备用代码 | |||
| 成对不等性码 | |||
|
alternate code : 10 phrases in 5 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Information technology | 2 |
| Oil / petroleum | 2 |
| Telecommunications | 4 |