kõvast materjalist (teemandist, kõvasulamist, karastatud terasest vms) valmistatud kera, püramiid või koonus, mis materjali kõvaduse määramisel surutakse katsekehasse
in hardness testing, a solid body of prescribed geometry, usually chosen for its high hardness, that is used to determine the resistance of a solid surface to penetration
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