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post mill 
The mill body pivots on a vertical axis when a tail pole is activated by the miller.
post
Structure on which the windmill rests and turns.
tail pole
Orientation device opposite the rotor; it is activated by a winch and turns to keep the sails in the direction of the wind.
steps
Structural element for accessing the inside of the windmill.
rotor
Part of the windmill that turns; it consists of rotating blades, which drive the windmill machinery.
