water softening
(obsolete) unthriftiness
Alternative form of multicentred
The removal of calcium and magnesium ions from water, or their replacement with sodium, either by chemical reaction or by ion exchange.
plural of kroppkaka
水中のカルシウムとマグネシウムイオンを除去したことで、ボイラーのスケール堆積が減り、耐用年数が延びた。
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