The main facilities in the Andritz pressure screen models: LP-S-HF800/77-00, LP-D-SA-D31H1-85-DE, LP-D-SA-D31H5-120-DE1 and other supporting units are: the city ring source Tianbao, Huayi environmental innovation, Fangyuan machinery, Henan province machinery, and so on, the German BURGMANN standards, a large number of stocks, stock