pitch coal: 28 phrases in 15 subjects |
Aluminium industry | 1 |
Cement | 2 |
Chemistry | 1 |
Construction | 4 |
Electrochemistry | 2 |
Geology | 2 |
Leather | 1 |
Makarov | 2 |
Metallurgy | 1 |
Mining | 2 |
Oil / petroleum | 1 |
Polymers | 2 |
Rail transport | 1 |
Road works | 2 |
Technology | 4 |