salt bath


noun

metallurgy a bath of molten salts in which steel can be immersed to soak to a uniform and accurately maintained temperature as part of the process of heat treatment. Different salts are used for different temperatures

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“Compliment” and “complement” had a shared meaning a long time ago, but today they are no longer interchangeable.
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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