What was the ancient term for a mill

Anciently known as a mill is a stone mill.

The mill is primarily a stone tool used to hull grains such as sorghum, grain, rice, etc. or to grind rice into ballast or flour by human or animal power. This tool is very common in rural China before electrification. But now because of the rapid development of the times has rarely used him.

It consists of a cylindrical millstone (also known as a milling wheel or roller) about 70 centimeters long and 60 centimeters in diameter, and a milling plate about 170 centimeters in diameter that carries it. The disk is mounted on a platform made of stone or adobe. In order to keep the roller from falling off the disk as it rolls, the roller is connected to the mill frame (square wooden frame) surrounding it by two shafts. Extension of the mill frame at the outer end of the wood as a handle to push the mill or tie sets of livestock rods, the inner end of the center of the mill and stand in the center of the mill connected to the shaft.