| |||
| cabo de tracção; cabo trator principal | |||
| madre | |||
| via direta; eixo principal; linha principal; via principal | |||
|
main-line : 19 phrases in 8 subjects |
| Agriculture | 1 |
| Electronics | 4 |
| Industry | 1 |
| Information technology | 1 |
| Mechanic engineering | 2 |
| Rail transport | 1 |
| Statistics | 1 |
| Transport | 8 |