单词	melopiano
释义	melopiano noun melo·​piano ¦melō+ plural melopianos : a 19th-century device intended for installation in a piano and containing metal springs that cause small hammers to bounce repeatedly against the piano strings to sustain or swell their sound while producing a tremolo effect Word History Etymology melo- entry 1 + piano First Known Use 1872, in the meaning defined above
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