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词汇 roof swell
释义

Definition of roof swell in English:

roof swell

noun

  • A mechanism for creating crescendo and diminuendo effects on an organ by opening and closing the upper shutters on a swell box.

Origin

Mid 19th century; earliest use found in Seidel's Organ and its Construction. After German Dachschweller.

Definition of roof swell in US English:

roof swell

noun

  • A mechanism for creating crescendo and diminuendo effects on an organ by opening and closing the upper shutters on a swell box.

Origin

Mid 19th century; earliest use found in Seidel's Organ and its Construction. After German Dachschweller.
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