The material through the grain elevator from the top into the color sorter, conduct a sorting, the qualified materials (a good product) is finished,

Once the sorting unqualified material (a bad product) by the user through the lifting machine to two times the sorting channel for two times,

Two screening qualified materials (two yield) directly into the grain elevator back to a re sorting sorting,

And the two sorting of substandard materials (excluding materials) is a waste.