福彩3d九宫格图片简介:There were waterwheels in ancient China, but they all required pedals, a lot of work, and the amount of water they could lift was limited. However, water-lifting windmills rely on the power of the wind. As long as there is wind and the wooden leaves rotate, the river water can be easily lifted to the shore, almost No manpower is required.
There were waterwheels in ancient China, but they all required pedals, a lot of work, and the amount of water they could lift was limited. However, water-lifting windmills rely on the power of the wind. As long as there is wind and the wooden leaves rotate, the river water can be easily lifted to the shore, almost No manpower is required.