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Auxetophone

资料来源 : pyDict

助声器

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Auxetophone \Aux*e"to*phone\, n. [Gr. ? that may be increased +
   ? sound, voice.]
   A pneumatic reproducer for a phonograph, controlled by the
   recording stylus on the principle of the relay. It produces
   much clearer and louder tones than does the ordinary
   vibrating disk reproducer.
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