| |||
base course; bedding course | |||
bedding course (materiał podsypany); subgrade filling (materiał podsypany); subgrade | |||
| |||
bed; bottom; sole; subsoil | |||
ballast; railroad ballast; track ballast |
podsypka: 16 phrases in 3 subjects |
Construction | 11 |
Rail transport | 1 |
Transport | 4 |