A cooling mechanism is provided to control the direction of flow of cooled air in an apparatus used to manufacture metallic containers, wherein machinery wear is reduced and the tolerance of the finished factory container height is maintained within a predetermined tolerance. The tool further includes at least one brush being radially moveable relative to the shaft to an extended position and a retracted position. As a result that use of the gas-insulated switch according to the present invention improves the overall energy efficiency of components, a device with further reduced driving energy can be realized for a gas-insulated switch of the same specification. Each signal value of a set is acquired during a same ordered time segment. The control unit controls operations of the joints in accordance with the operating command. As candidate BTSs are uniquely identified, it is possible to use this additional identification information in an iterative process to further identify additional candidate BTSs.