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bubble eyepiece, or ocular lens, is a type of lens that is attached to a variety of optical devices such as spirit level, okulaar, mis on kinnitatud mitmesugustele optilistele mõõtevahenditele, milleks on ka vesilood
bubble eyepiece . Metroloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mea/bubble%20eyepiece/1/eng (19.06.2026)
