Net: Less impurities. Most of them are implemented in accordance with the national standard.
Saturation: according to different purposes, set certain national standard grade requirements. For example, wheat storage requires more than two national standards.
Others; Bad particles and other physical indicators required by national standards.
Higher requirements also include quality biochemical indicators. Such as aflatoxin content, pesticide residue and heavy metal content.
In addition, gluten content, oil yield,