- any substance that lessens the hardness of water, usually by precipitating or absorbing calcium and magnesium ions
- a tank, apparatus, or chemical plant that is used to filter or treat water to remove chemicals that cause hardness
单词 | water softener |
释义 | WordReference Random House Unabridged Dictionary of American English © 2024 wa′ter sof′tener,
Collins Concise English Dictionary © HarperCollins Publishers:: water softener n
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