... .Convenient operation 2.Low noise 3.High efficiency 4.Easy maintenance Swing Screen ... area: accurate to six separate screening efficiency as high as 90-95%2.use the silicone rubber ... balls, ultrasonic devices such as high-definition network systems, no mesh block.3.Closed ... rubber, feed, fertilizer, sugar, salt, recycling industry. 2012 New High quality made in China Swing screen