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| road base | |||
| bearing layer | |||
| base; base course; foundation | |||
| base and sub-base | |||
| |||
| basecourse (Straßenbau); core (Sandwichpanel); roadbase (Straßenbau); basis; bearing bed; bearing course; supporting bed; supporting stratum | |||
| bearing stratum | |||
| |||
| sub-base | |||
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Tragschicht : 23 do fraz, 6 tematyki |
| Budownictwo | 10 |
| Pospolicie | 2 |
| Przemysł | 3 |
| Roboty drogowe | 2 |
| Technika i technologia | 3 |
| Transport | 3 |