Difference between revisions of "Whistle"
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Revision as of 00:16, 25 February 2009
3-2-235
Fog signal apparatus comprising a resonator having an orifice of suitable shape such that when a jet of air is passed through the orifice the turbulence produces a sound.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
