Raw grains are soaked for 1-4 hours till it contains 3-4% moisture. Then, and half dry corn processing equipments, horizontal wheat scourer with the mace is used to strike and push them. The machine with power over 45kw, is over pressured, resulting in a worn-out of sieve plate. Thus it will affect quality of the grits and flour as the largely crushed germs are mixed with endosperms, making it difficult to separate.

Another half dry corn processing equipment is changed from wheat huller with washboard inside to striking board inside and renamed as hulling and determination machine to decrease manufacturing costs. Operation principles and products are similar to horizontal wheat scourer.