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sand base course; sand bed | |||
sand mattress (под каменную наброску) | |||
sand cushion; sand mattress (под каменную наброску или под фундамент) |
песчаная подготовка : 9 phrases in 5 subjects |
Architecture | 1 |
Bridge construction | 1 |
Construction | 2 |
Electronics | 1 |
Technology | 4 |