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单词 battery-unit
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battery-unit
battery-unit n.
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the world > matter > physics > electromagnetic radiation > electricity > galvanism, voltaism > voltaic or galvanic battery > [noun] > pack of
battery-unit1939
1939 War Illustr. 9 Dec. p. ii/3 This trade, which consists in selling torches that are loaded with worn-out battery-units from wireless sets.
1958 Newnes Compl. Amateur Photogr. x. 112 A flashgun consists of a socket to hold the flashbulb, a case to contain the battery unit and a reflector.
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