(1)The rubber balls are used for keeping the screen surface
clean, and it is convenient for seed change, screen replacement
and machine cleaning.(2)The self-regulating structure of the
double sieve boxes can improve the stability of machine
operating.(3) The air flow can be adjusted by changing the fan
speeds to simplify machine structures and keep stable and easy
adjustment.(4)The base slab structure of the screen can be
transferred for improving grading capacity. (5)The vibration
frequency of the screen can be adjusted, and the productivity
and separating rate can be adjusted as required.