The usage of spiked wheels, the first steam engine and vending machine (Heron) [the venting machine was a lever in a spring of holy water, the weight of the coin moved the lever, until it fell, and the lever returned to its original position and close the spring], the ”Helepolis” (the taker of cities- siege tower) the largest moving construction until the modern age, the Archimedes screw, used even today.

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