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单词 prism binoculars
释义 prism binoculars
[`priz·ǝm bǝ`näk·yǝ·lǝrz]
OPTICS
A type of binoculars, each half of which is a Kepler telescope that employs a Porro prism erecting system both to erect the image and to reduce the length of the instrument. Also known as prismatic binoculars.
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