Who invented Velcro?1). Thomas Edison2). William Harvey3). George de Mestral4). Robert Boyles
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1. Who discovered Nitrogen?
2. Who Invented water turbine?
3. Who Invented the 3-D printer?
4. What was invented by Zacharias Jansen?
5. Who invented 'Coca Cola'?
6. Who Invented Neon Lamp?
7. Who discovered benzene?
8. Who Invented Post-it note?
9. Who invented the electric tram?
10. The remains of an ancient civilization of 4000 BC were discovered in??..
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