soap test
noun1
A test for determining the hardness of water by shaking it up with liquid soap (and not detergent).
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
noun
A test for determining the hardness of water by shaking it up with liquid soap (and not detergent).
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
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