9 Battery chargers; light or laser welding apparatus (not for medical purposes); electric welding or cutting apparatus, in particular for arc welding equipment; welding electrodes, current and voltage converters, in particular for welding apparatus; electric circuits, namely phase-inverting current sources, variable-frequency inverters, plasma welding current sources; transformers, photovoltaic units, components for welding automation; control systems for manipulating apparatus or robots, microprocessor control systems for all of the aforementioned goods; computer software programmes on data carriers; parts of all the aforementioned goods, provided not included in other classes