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pendulum bar /ˈpɛndjʊləm ˈbɑː/ n

中文：摆杆

中文 · 摆杆Español · varilla del pénduloFrançais · tige de pendule
Meaning：Metal rod that oscillates from one side of an axis to the other to produce a sound signal.
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Metronome Metronome

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