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. 07 December 2018. <https://www.yourdictionary.com/echelon-lenses>.
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echelon-lenses. (n.d.). Retrieved December 07th, 2018, from https://www.yourdictionary.com/echelon-lenses
