l. Physical time can ensure the retention time of screening materials. When the accuracy is higher, the gate should be opened to remove the material on the screen to ensure the accuracy and treatment capacity. The gate type rotary vibrating screen has a gate device, which can sieving the material for a long time. It has the function of ultra high precision screening and preventing material leakage, and it is used for long time screening operation of fine powder and fine powder. However, due to t