... action ,double action process's need.Combining with hydraulic die cushion,can realize positive-drawing,reversed-drawing,composite-drawing ... secondary drawing process.2.Adopt closed combination frame,hydraulic drawing and preloading frame,insure high rigidity.Eight- ... .5.Can choose movable worktable,quick die change,punching buffer and hydraulic beating material equipments.ItemsUnitYJ28E-250/400YJ28E- ...