A print job can be identified without the print data of the print job being analyzed, and print data for a print job that is selected, e. An inertia lever with certain inertia moment in relation ship to that of the handle is coupled to the handle, such that it rotates in the opposite direction of that of the handle when the handle is being pulled. \u201d The eyeglasses can also include one or more operation indicators. The chamfering cutter and the deburring cutter are disposed so that the cutting change amount of the chamfering cutter and that of the deburring cutter will be approximately equal to each other throughout the diameter range of the workpiece to be processed.