crown glass
参考词典中crown glass的常规释义：
基本释义
- n.冕牌玻璃(光学玻璃的一种)
英英解释
2个名词解释
- a glass blown into a globe which is later flattened and spun to form a disk
- optical glass of low dispersion and low refractive index
[同] crown glass, optical crown, optical crown glass
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