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| contrast grade (fotografisch); hardness grade | |||
| degrees of hardness | |||
| hardness degree (Wasser) | |||
| hardness number; hardness numeral; index of hardness | |||
| contrast grade; grade of contrast | |||
| degree of hardness; grade; temper; grade of hardness; hardness; temper classification | |||
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| degrees of hardness | |||
| Härtegrad: 6 phrases in 2 subjects |
| Analytical chemistry | 4 |
| Metallurgy | 2 |