英语词汇“standard sand ottawa sand”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	standard sand ottawa sand
释义	standard sand Ottawa sand standard sand Ottawa sand, accurately graded to pass a 850-µ (US Standard No. 20) sieve and to be retained on a 600-µ (US Standard No. 30) sieve; used in testing cements.
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standard sand Ottawa sand