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| indentation hardness | |||
| static ball penetration hardness | |||
| hardness Resistance of a solid to indentation, scratching, abrasion or cutting; water hardness The amount of calcium and magnesium salts dissolved in water; alkalinity; calcium-content | |||
| hardness | |||
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| water hardness | |||
| hardhed: 35 do fraz, 6 tematyki |
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