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English definition of “water softener”

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water softener

noun [C] uk   us  
a substance or device that removes chemicals such as calcium from water
Translations of “water softener”
in Chinese (Traditional) 軟水劑, 硬水軟化器…
in Chinese (Simplified) 软水剂, 硬水软化器…
(Definition of water softener from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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