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百度
谷歌
图片
维基
百科
智典 crown glass 
- n.冕牌玻璃(光学玻璃的一种)
英英解释
2个名词解释
- optical glass of low dispersion and low refractive index
[同] crown glass , optical crown , optical crown glass - a glass blown into a globe which is later flattened and spun to form a disk
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