英语词汇“effective opening”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	effective opening
释义	effective opening effective opening The minimum cross-sectional area of the opening at the point of water-supply discharge, expressed in terms of diameter of a circle; if the opening is not circular, the diameter of a circle of equivalent cross-sectional area is given.
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