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toe piston /ˈtəʊ ˈpɪstən/ n

中文：脚踏活塞

中文 · 脚踏活塞Español · acoplamiento de pedalFrançais · pédale de combinaisons
Meaning：Mechanism controlled by foot that prepares the pipes in advance, making them sound only when the pedal is pushed.
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Pipe Organ

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