Urdu Meanings, Pronounciation and Synonyms:
crown glass
(Pronunciation -تلفظ سنیۓ )
US: 
Slow
Normal
Noun: crown glass
| 1. crown glass | |
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A glass blown into a globe which is later flattened and spun to form a disk
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| 2. crown glass [ Synonyms: optical crown, optical crown glass] | |
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Optical glass of low dispersion and low refractive index
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