 |
| lower: 17 phrases in 6 subjects |
| Abbreviation | 8 |
| Military | 5 |
| Nuclear and fusion power | 1 |
| Photography | 1 |
| Transport | 1 |
| United States | 1 |
|
| lower: 17 phrases in 6 subjects |
| Abbreviation | 8 |
| Military | 5 |
| Nuclear and fusion power | 1 |
| Photography | 1 |
| Transport | 1 |
| United States | 1 |