Noun
- plural form of echelon lens
echelon-lenses
English Wiktionary. Available under CC-BY-SA license.
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"echelon-lenses." YourDictionary, n.d. Web. 30 May 2019. <https://www.yourdictionary.com/echelon-lenses>.
APA Style
echelon-lenses. (n.d.). Retrieved May 30th, 2019, from https://www.yourdictionary.com/echelon-lenses
