 |
| diamond hardness: 31 phrases in 16 subjects |
| Automated equipment | 2 |
| Combustion gas turbines | 1 |
| Construction | 2 |
| Electrochemistry | 3 |
| Electronics | 2 |
| Makarov | 5 |
| Mass media | 2 |
| Metallurgy | 2 |
| Metrology | 2 |
| Military | 1 |
| Mining | 1 |
| Physics | 1 |
| Polymers | 2 |
| Quality control and standards | 1 |
| Silicate industry | 1 |
| Technology | 3 |