English中文
upright piano action /ˈtaɪps ɒv sɪnˈəʊvɪəl ˈdʒɔɪnts/ n

中文：立式钢琴击弦机

中文 · 立式钢琴击弦机
Meaning：Combination of elements whereby energy applied to a key is transferred to the hammer, which in turn causes the strings to vibrate.
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Upright Piano Action

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