Автор: Пользователь скрыл имя, 01 Марта 2013 в 13:22, контрольная работа
Vending machine will absolutely change our university’s life. Almost every person in our university will use our vending machine, because people want to save their precious time and have a quick snack.
The first reference to a vending machine is in the work of Hero of Alexandria, a first-century engineer and mathematician. His machine accepted a coin and then dispensed holy water. When the coin was deposited, it fell upon a pan attached to a lever. The lever opened a valve which let some water flow out. The pan continued to tilt with the weight of the coin until it fell off, at which point a counterweight snapped the lever up and turned off the valve.
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