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| rock hardness; rock strength | |||
| hardness Resistance of a solid to indentation, scratching, abrasion or cutting | |||
| hardness; roughness; toughness | |||
| tvrdost: 29 phrases in 6 subjects |
| Agriculture | 2 |
| Construction | 18 |
| Environment | 1 |
| General | 4 |
| Hydrology | 2 |
| Metallurgy | 2 |