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Parts of the frame of an optic, into which the rings are fitted.
Parts of the frame of an optic, into which the rings are fitted.


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Revision as of 10:05, 25 February 2009

2-2-055

Parts of the frame of an optic, into which the rings are fitted.




Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)