General Science · Inventions and Discoveries
1804 में पहले सफल भाप लोकोमोटिव (रेल इंजन) का आविष्कार किसने किया था?
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- 3रिचर्ड ट्रेविथिक✓
- 4जेम्स वाट
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रिचर्ड ट्रेविथिक
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