Corn mill is a kind of equipment specially used for grinding corn into powder. Its main function is to process corn kernels into fine powder, which usually involves extruding and grinding the corn kernels, and then separating the flour and bran by sifting.

A wheat mill is an industrial-use machine that is used to process wheat into flour. This machine produces flour by grinding wheat kernels, removing the outer bran and the inner germ.

A flour mill is a processing machine that relies on external power (such as power generated by an electric motor) to grind wheat into small particles, and separates flour particles of different sizes by adjusting the size of the sieve holes to obtain flour.

A grinding machine (also called a milling machine) is a device used to process raw materials such as grains and minerals and grind them into powder. It mainly crushes the raw materials into the required fineness and shape through mechanical effects such as extrusion, grinding, friction and impact. Grinding machines are widely used in the milling of grain crops such as wheat and corn, as well as the grinding of mineral products in the fields of metallurgy, building materials, chemicals, mining, etc.