 |
| |||
| корректурный знак пробела | |||
| знак пробела | |||
| стереоскопическая марка; пространственная марка | |||
| space mark: 36 phrases in 10 subjects |
| Aviation | 1 |
| Communications | 2 |
| Electronics | 12 |
| General | 1 |
| Information security and data protection | 1 |
| Information technology | 4 |
| Makarov | 1 |
| Mass media | 8 |
| Mathematics | 2 |
| Technology | 4 |