Kis vegyanic ne barf ke do
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Please elaborate your que and ask again thank you.
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Heya mate.....
Question : किस वैज्ञानिक ने सर्वप्रथम बर्फ के दो टुकड़ो को आपस में घिसकर पिघला दिया ?
Answer : डेवी
Hope this will help you......
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