Alt i scope
Chamber's Twientieth Century Dictionary · 1908 · p. 136
al′ti-skōp, n. an instrument containing several lenses and mirrors, so arranged that an observer can see beyond intervening objects.
Bu kavram başka kaynaklarda da geçiyor
The American Dictionary and Cyclopedia (1910)
The Optical Dictionary (1904)
A Military Dictionary and Gazetteer (1881)
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