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flash boiler

noun
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Definition of flash boiler

: a steam boiler that has very strong tubes with little water space which are kept nearly red-hot so that the water coming to them in small amounts is flashed into steam and superheated

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“Flash boiler.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flash%20boiler. Accessed 21 Oct. 2021.

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