... 3.18years experience hydraulic screen changer Raw material:steel,45Cr(1) Veneer, double board, simple columnar, double column of net changers device ... , hydraulic change nets quickly, facilitate production and maintenance.Using built-in sealing device, sealed performance is ... ) Almost all of the polymer can be used for nets device, such as: PC, PMMA, PET, PS, PU, PP, ...