“proportional reducer”的概念、定义、翻译、参考文献-科学参考

单词	proportional reducer
释义	proportional reducer [prǝ`pȯr·shǝn·ǝl ri`dü·sǝr] ^{GRAPHIC ARTS} A solution that is used to lower density in a negative or positive image in proportion to the silver present, with a certain amount of loss in shadow detail.
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