कौन-सा पदार्थ बहुत कठोर और बहुत तन्य है?

Asked Sep 15, 2023 Modified Sep 15, 2023 Viewed 0 times
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asked Sep 15, 2023 at 11:32
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नाइक्रोम
answered Sep 15, 2023 at 11:32

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