= footcandle n. at foot, n. int.compounds 2.
单词 | θ80357 |
释义 | the world > matter > light > illumination > [noun] > unit of illumination > candela > foot-candle (2) candle-foot1892 = footcandle n. at foot, n. int.compounds 2. footcandle1906 a unit of illuminance, defined as the degree of illumination that the interior of a sphere with a radius of one foot would receive from a central… |
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