A pressure roller support member that rotatably supports a pressure roller is supported to a fixing unit case so as to be capable of swaying. The subdural evacuation portion includes a rigid tubular portion having a central axis, a threaded exterior surface, and a pair of wings extending outwardly in substantially opposite directions from the tubular portion. The local computer determines if it has the first resource file stored in local storage. By applying high frequency voltage to the electrode array and the return electrode, the electrically conducting liquid generates a current flow path between the return electrode and the electrode array so that target tissue may be cut or ablated. Some embodiments include a tetracycline with an excess of a divalent or trivalent cation. The TERA coating can, for example, be incorporated within a single damascene structure, or a dual damascene structure.