How 7 small inventions define complex technology machines

At 47th International Kolkata Book Fair, January 18-31, British structural engineer Roma Agrawal talks about her new book â€˜Nuts and Boltsâ€™ on small inventions that made possible complex machines: nail, wheel, spring, magnet, lens, string, pump At 47th International Kolkata Book Fair, January 18-31, British structural engineer Roma Agrawal talks about her new book â€˜Nuts and Boltsâ€™ on small inventions that made possible complex machines: nail, wheel, spring, magnet, lens, string, pump Moneycontrol Latest News Read More

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