How NFL Footballs Are Made

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450 هزار بار بازدید - 7 سال پیش - Before NFL footballs can hit
Before NFL footballs can hit the field, they go through a five-day manufacturing process. Durable leather is sewn together around a bladder, which has the right amount of air to meet the specific weight and size requirements of the game.

See more from the Science Channel series 'How It's Made':
https://www.sciencechannel.com/

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