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apparatus for conversion between ac and ac, between ac and dc,or between dc and dc, and for use with mains or similar powersupply systems (2) 2
control or regulation thereof (2) 2
conversion of dc or ac input power into surge outputpower (2) 2
conversion or distribution of electric power (2) 2
electricity (2) 2
generation (2) 2
circuit arrangements or systems for supplying or distributingelectric power (1) 1
systems for storing electric energy (1) 1
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