1. Small size, light weight, easy to move, the direction of the discharge port can be adjusted arbitrarily, and the coarse and fine materials are automatically discharged, which can be automated or manually operated. 2. High screening accuracy and high efficiency, any powder, granule and mucus can be used. 3. The screen is not blocked, the powder is not flying, and the sieving can reach 500 meshes (28 microns) and the filtration can reach 5 microns. 4. Unique mesh frame design (sub-mother type), the screen mesh can be used for a long time, it is convenient to change the mesh, it only takes 3-5 minutes, the operation is simple, and the cleaning is convenient. 5. No mechanical action, easy maintenance, single-layer or multi-layer use, and the parts in contact with materials are made of stainless steel (except for medical use).