General Science · Inventions and Discoveries
होवरक्राफ्ट का आविष्कार किसने किया?
- 1थॉमस एडिसन
- 2अलेक्जेंडर ग्राहम बेल
- 3जेम्स वाट
- 4सर क्रिस्टोफर कॉकरेल✓
सही उत्तर देखें
सर क्रिस्टोफर कॉकरेल
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