1 Results for optical crown
/อ๊า ผึ ถิ เขิ่ล คราว น/     /ˈɑːptɪkəl krˈaʊn/
หรือค้นหา: -optical crown-, *optical crown*

WordNet (3.0)
optical crown(n) optical glass of low dispersion and low refractive index, Syn. optical crown glass, crown glass

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