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口こう径けい比ひ
Meanings
Noun
1. aperture ratio (inverse of the f-number); relative aperture
Kanji used
口
mouth
径
diameter
比
compare (things of the same type)
Pitch accent
こ
うけ
いひ
Composed of
aperture; bore; calibre; caliber
① 比率。割合。② 比肩しうるもの。比較の対象。くらべもの。