 |
| drop bottom: 39 phrases in 18 subjects |
| Automated equipment | 1 |
| Bridge construction | 1 |
| Chess | 1 |
| Construction | 3 |
| Drilling | 1 |
| Electronics | 1 |
| General | 4 |
| Geology | 1 |
| Makarov | 1 |
| Mechanics | 1 |
| Metallurgy | 3 |
| Military | 1 |
| Mining | 3 |
| Rail transport | 5 |
| Road works | 2 |
| Sakhalin | 1 |
| Silicate industry | 1 |
| Technology | 8 |