| |||
| 标志层; 标准层 | |||
| 标准层位 | |||
| 指示层 | |||
|
indicator horizon : 12 phrases in 6 subjects |
| Aviation | 3 |
| Electronics | 1 |
| General | 1 |
| Information technology | 1 |
| Space | 4 |
| Technology | 2 |
| |||
| 标志层; 标准层 | |||
| 标准层位 | |||
| 指示层 | |||
|
indicator horizon : 12 phrases in 6 subjects |
| Aviation | 3 |
| Electronics | 1 |
| General | 1 |
| Information technology | 1 |
| Space | 4 |
| Technology | 2 |