photographic density
美 [ˌfoʊtəˈɡræfɪk ˈdensəti]英 [ˌfəʊtəˈɡræfɪk ˈdensəti]
- 照相（片）密度；底片黑度
photographic density-
An instrument for determining optical or photographic density .
测量光学或摄像的密度的仪器。
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" Terms , symbols , coordinate system and functional notations for photographic density measurements "
GB/T12823-1991摄影密度测量的术语、符号、坐标系和函数表示法
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Geometric conditions for photographic reflection density measurement
GB/T12822-1991摄影反射密度测量的几何条件
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