This machine is special designed for punching above mentioned draw holes on copper pipes used as flute pipe in AC radiators. I Main features:l Servo feeding, hydraulic formingl NC control, convenient operationl Good punching & drawing result, high efficientII Main technical dataNo.ItemData1Max. copper pipe diameterΦ50mm2Min. copper pipe diameterΦ9.52mm3Copper pipe wall thickness0.6~1.5mm4Max. ...