英语词汇“direct positive”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	direct positive
释义	direct positive noun : a positive in photography that is made directly by exposure to light and by development without the use of a negative
随便看	sulfohalite sulfon- sulfonal sulfonamide sulfonamides sulfonate sulfonated sulfonated oil sulfonates sulfonating sulfonation sulfonations sulfonator sulfonchloramide sulfone sulfonephthalein sulfones sulfonic sulfonic acid sulfonium sulfoniums sulfonmethanes sulfonphthalein sulfonyl sulfonyl chloride

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direct positive