... Product precision is outstandlng, upper roller submit drum shape, the bottom of lower roller has the cooperetion regulation of beadng ... 6.Different use, cooresponding control method, there is following control way acoording to use: TNC ( up NC) much kind, ... type bending; rear curved way ,U type bending; front curved way, multistage R bending: comblned -type way.... ModelPressure on TheMax. ...