indice de dureté /TECH/
[DE] Härtegrad; Härtezahl
[EN] hardness number; hardness numeral; index of hardness
[FR] indice de dureté
hardness factor,indice de dureté /ENERGY-MINING,INDUSTRY-METAL/
[DE] Haertefaktor; Hardness Factor
[EN] Hardness Factor; Hardness Index
[FR] hardness factor; indice de dureté