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Description
A windmill is a machine that converts the energy of wind into rotational energy by means of vanes called sails or blades. Originally, windmills were developed for milling grain for food production. In the course of history, the windmill machinery was adapted to many other industrial uses. Most windmills built today are wind turbines used to generate electricity, or windpumps used to pump water, either for land drainage or to extract groundwater.

Description
A windmill is a machine that converts the energy of wind into rotational energy by means of vanes called sails or blades. Originally, windmills were developed for milling grain for food production. In the course of history, the windmill machinery was adapted to many other industrial uses. Most windmills built today are wind turbines used to generate electricity, or windpumps used to pump water, either for land drainage or to extract groundwater.