英语词汇“permanent hardness”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	permanent hardness
释义	permanent hardness noun [mass noun] The presence in water of mineral salts (chiefly calcium sulphate) that are not removed by boiling.
随便看	Caprivi Strip caproate cap rock caproic acid caprolactam caprylate caprylic acid caps capsaicin Capsian capsicum capsid capsize cap sleeve cap-sleeved capstan capstan lathe capstone capsular capsulate capsule capsulise capsulize Capt. captain

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