Encara no tenim significats per a "relative hardness".
1The relative hardness of the diamond, in different directions, is a singular fact.
2The two kinds are readily distinguished from each other by their relative hardness.
3Since the 1800s, the relative hardness of materials has been measured using a simple scratch test.
4She further sorted the metal by relative hardness and purity according to the qualities the crystals displayed.
5Its lakes have been formed quite regardless of the lie of the rocks, though not regardless of their relative hardness.
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