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Slovo tvrdost může mít několik významů:

Duresa | Hårdhed | Härte | Hardness | Dureza | Dureté (matériau) | קשיות | Durezza | 硬さ | Hardheid | Twardość | Dureza | Trdota | Kovuus | Твёрдость | 硬度

 

This article is licensed under the GNU Free Documentation License. It uses material from the "Tvrdost".

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