UPSC CDS II 2024 GK Paper
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Question : 21 of 120
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X-rays can be used to:
1. inspect welded joints between two metal parts of a machine.
2. study structure of crystals.
Select the answer using the code given below:
1. inspect welded joints between two metal parts of a machine.
2. study structure of crystals.
Select the answer using the code given below:
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