Introduce a farm tool, what are its functions and benefits?

Farm Tools Windmill: China traditional farm tools-windmill-wind-grain cart (also known as windmill): a traditional wooden farm tool used in southern China to remove impurities, shriveled grains and straw scraps from rice and other crops. Windmill: A traditional wooden farm tool, which is used to remove impurities, shriveled grains and straw scraps from rice and other crops in southern China. Its basic structure is: there is a trapezoidal feeding bin at the top, a funnel for rice below, a small funnel for polished rice and shriveled grains at the side, and a chaff at the tail; A round "big belly" made of wood hides an impeller with an iron handle. When the blades are rotated by hand to raise the grain, the wind force generated by the fast rotation speed is also great, and vice versa. Holland is the windmill kingdom in the world, and the energy provided by windmills is a natural and environmentally-friendly renewable resource, which brings convenience to our lives.