1. You can use the wind power from the windmill to "win the field", dry the harvested rice and separate the rice and rice husk.
2. Using wind turbines to provide wind energy to provide water, heating, refrigeration, transportation, electricity generation, etc.
3. The basic principle of old-fashioned airplanes is the same as that of windmills. The propeller (windmill) rotates at high speed to generate a strong airflow, allowing the plane to take off.