hopper -bottom : 32 phrases in 14 subjects |
Construction | 1 |
Electronics | 6 |
Energy industry | 3 |
Food industry | 1 |
Forestry | 1 |
General | 1 |
Metallurgy | 2 |
Military | 3 |
Mining | 3 |
Nautical | 1 |
Rail transport | 3 |
Road works | 1 |
Technology | 1 |
Thermal engineering | 5 |