an and disinfect thoroughly. (3) new type of grid structure. The service life of the screen is long. It takes only 3-5 minutes to change the network. (4) it can be used in single layer and multilayer screen. (5) small volume does not occupy space, mobile is convenient, export can be adjusted at 360 degrees. (6) all contact parts with stainless steel are made of stainless steel. (7) the material is discharged automatically, and it can be operated continuously. (8), full airtight dust does not fly