Flettner windmill

例句：

1. 1. The Flettner windmill is a symbol of the town's industrial heritage.
   Flettner风车是这个城镇工业遗产的象征。
2. 2.The old Flettner windmill has been restored to its former glory.
   这座古老的风车已经恢复了它以前的辉煌。
3. 3.The Flettner windmill was once used for grinding grain, but now it serves as a museum.
   Flettner风车曾经用来磨谷物，但现在它作为博物馆展出。