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Colorful flowers

The color of solid objects is determined by the light reflected in them.

Body temperature thermometer

If the thermometer cools down the column of mercury breaks at the constriction

Breakwater

This structure helps speed up the flow of water, thus it prevents the formation of reefs along the middle line of the watercourse

Well sinking

When a water table is near, a well can also be sunk with manual methods.

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