n04268418
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<synset id="n04268418" type="n"> <lex_filenum>06<lex_filenum/> <word lex_id="0">spark chamber<word/> <word lex_id="0">spark counter<word/> <pointer refs="n03894051">Hypernym<pointer/> <def>an instrument that detects ionizing radiation from elementary particles<def/> <synset/>