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单词
lumen-hour
释义
lumen-hour
lumen-hour
[
′lü·mən ¦au̇r
]
(optics)
A unit of quantity of light (luminous energy), equal to the quantity of light radiated or received for a period of 1 hour by a flux of 1 lumen. Abbreviated lm-hr.
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更新时间:2025/6/27 11:23:42