error indication: 24 phrases in 11 subjects |
Automobiles | 2 |
Bridge construction | 1 |
Computers | 1 |
Firefighting and fire-control systems | 1 |
Makarov | 1 |
Metrology | 2 |
Nautical | 1 |
Quality control and standards | 3 |
Rail transport | 1 |
Technology | 8 |
Telecommunications | 3 |