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Class 10 science | Light | CBSE | Why is ambulance written in reverse? | vidyakul | by mitali ma'am
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Why do we use a black umbrella in summer? | CBSE class 10 science | vidyakul | by mitali ma'am
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What is Oximeter? | How does Pulse Oximeter work? | vidyakul | by mitali ma'am
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