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қаттылық шкаласы

The scale used to measure the degree to which a stone or mineral is resistant to scratches. Hardness is measured from 1-10, 10 (diamonds) being the hardest.

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Settore/Dominio: Persone Categoria: Musicisti

Боб Дилан

American singer-songwriter and poet, well known since the 1960s when he became seen as a figurehead of social unrest and change through his songs ...