the earliest water mill in China
Milling is a kind of machinery that processes rice, wheat, beans and other grain into flour. In the Jin Dynasty, China invented a water mill powered by water.
The power part of the water mill is a horizontal water wheel. The upper fan of the mill is installed on the main shaft of the wheel, and the water impulse the water wheel to drive the mill to rotate. With the progress of mechanical manufacturing technology, later people invented a kind of water mill with more complicated structure. One water wheel can drive several mills to rotate at the same time. This kind of water mill is called water turbine connected mill.