solids content : 36 phrases in 12 subjects |
Agriculture | 2 |
Animal husbandry | 3 |
Drilling | 4 |
Earth sciences | 1 |
Ecology | 1 |
Food industry | 2 |
Hydroelectric power stations | 2 |
Oil / petroleum | 1 |
Plastics | 1 |
Technology | 16 |
Water resources | 2 |
Wood processing | 1 |