Sluice Gate Of The Pyramid

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Figure 1. The stones were surrounded by air bags made of animal skin, so that they float on water (a). The wrapped stones were then transported to the foot of the pyramid where they were guided into a water pipe that was constructed onto the pyramid (with inclination 51.8 degrees) (b). As a result of the upward buoyance force, the stone carrier moves upward in the pipe until it reaches a first sluice gate. At that moment, a similar sluice gate at the foot of the pyramid is closed and the gate that was reached by the stone is opened. The sequence is repeated until the stone reaches its destination (c). The dimensions of stone with carrier bags and the water pipe are shown in (c).
The sluice gates are opened one by one when the wrapped block

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