... photographic chemistry 照相化学 photographic contrast 照相对比度 photographic densitometer 照相密度计 ...
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In sensitometry, the characteristic values of sensitivity and contrast coefficient are generally, obtained from photographic characteristic curve graphically.
在感光测定中，一般都用图解的方法从感光特性曲线上求出感光度、反差系数等特性数值。
This paper presents an outline on the structure and properties of multi-contrast black-and-white photographic paper.
本文扼要介绍了多反差黑白照相纸的结构和性能特点。
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