|
shell -structure : 36 phrases in 14 subjects |
| Architecture | 2 |
| Aviation | 1 |
| Bridge construction | 2 |
| Chemistry | 1 |
| Earth sciences | 1 |
| General | 1 |
| Geophysics | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 2 |
| Nuclear physics | 2 |
| Polymers | 4 |
| Space | 4 |
| Technology | 13 |
| Wind Energy | 1 |