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单词 ft-c
释义

ft-c

enUK

ft-c

abbr. foot-candle

ft-c

enUK

illuminance

The density of luminous power, also called illumination. One lumen of luminous flux, uniformly incident on 1 square foot of area, produces an illuminance of 1 footcandle; in SI units, one lumen of luminous flux, uniformly incident on 1 square meter of area, produces an illuminance of 1 lux.
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更新时间:2024/12/22 22:47:16