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開かい口こう数すう
Meanings
Noun
1. numerical aperture (in photography)
Kanji used
開
open
口
mouth
数
number
Pitch accent
か
いこ
うすう
Used in: 1
Composed of
opening; aperture (e.g. camera); opening one's mouth; beginning to speak; open; broad
several; a number of; quantity; amount; counting; figures; number