relief frame
noun
: a frame or ring interposed between the back of a slide valve and the inside of the steam-chest cover in some large engines to prevent access of the steam to the greater part of the valve thereby relieving the pressure on the valve and materially reducing friction
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“Relief frame.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/relief%20frame. Accessed 30 Nov. 2024.
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