... aluminum, stainless steel,copp 3.Ferric chloride for etchant Automatic photo chemical etching machineEquipment Parameters: Model Number:EB650Etched typeDouble ... use the advanced alternative arrangement style,reduce the transverse distance between each spray nozzle, increase the spraying contact ratio ... and could work persistently for a long time5.The machine is made of PP plate,which is heat-resistant, ...