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光束 kōsoku
gen. luminous flux n; pencil (of light); pencil of rays River and Water Resources Glossary (Infrastructure Development Institute Japan)
phys. flux of light
tech. light flux
光束写真、 しゃしん kōsoku
gen. pencil of light River and Water Resources Glossary (Infrastructure Development Institute Japan)
光束
: 69 phrases in 5 subjects
General4
Lighting other than cinema22
Physics22
Radio1
Technology20