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| ferrous | |||
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ferrea : 64 phrases in 15 subjects |
| American usage, not spelling | 1 |
| Astronomy | 1 |
| Coal | 1 |
| Cultural studies | 1 |
| Environment | 16 |
| General | 7 |
| Labor law | 2 |
| Loading equipment | 1 |
| Metallurgy | 7 |
| Packaging | 3 |
| Patents | 3 |
| Rail transport | 1 |
| Spanish | 1 |
| Technology | 2 |
| Transport | 17 |