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reducer音标[ri'dju:s?] 汉语翻译n. 渐缩管, 缩减者, 还原剂 【化】 变径段; 变径管; 异径管; 大小头; 还原剂; 减速器; 减振器; 节流器 英语解释：名词 reducer:- a substance capable of bringing about the reduction of another substance as it itself is oxidized; used in photography to lessen the density of a negative or print by oxidizing some of the slackened silver
同义词：reducing agent, reductant - pipefitting that joins two pipes of different diameter
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