General Science · Inventions and Discoveries
'स्टीम इंजन (कंडेंसर)' का आविष्कार किसने किया था?
- 1थॉमस न्यूकोमेन
- 2जेम्स वाट✓
- 3अलेक्जेंडर पार्क्स
- 4जॉन वॉकर
सही उत्तर देखें
जेम्स वाट
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