What does grinding mean?

The explanation of grinding is to use hydraulic stone mill. "Tong Dian Shi huo II": "In the past, Baiqu irrigated four (10,000) hectares of farmland, but now Dajia rich merchants are fighting to build a millstone to stop the waste water, and the canal flow is not smooth, and irrigation is stopped for 10,000 hectares." "Zi Tongzhi Jian 'an Thirteen Years Dali, Tang Daizong": "Spring, the first month, the heart is there, destroying the tributaries of Baiqu to irrigate the fields." Hu Sansheng's note: "The public transport was built by the class, and later people stirred the water for it, without labor. Water is transferred to the mixing wheel to make it rotate, which is called water milling. " Ming Gui Youguang's Countermeasures for the Rural Examination of Jiajing Gengzike: "As an official of water conservancy, we always face each other. It is forbidden for the rich to press reeds and ponds to hinder the upper class. " Interpretation of the word decomposition mill: a tool for crushing or flattening things: grinding. Stone mill and steam mill. Rolling: rice milling. Mill (also known as "mill") radical: stone; Please refer to Yao for explanation. Radical: stone.