Shutter: Difference between revisions
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Revision as of 00:09, 25 February 2009
2-4-115
A device comprising opaque strips, usually mounted so that each may be rotated through about 90 degrees on an axis.
All strips rotate simultaneously so as alternately to exhibit or obscure a light.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
