crown sheet
noun1
The flat plate which forms the top of the furnace or firebox of an internally fired steam boiler.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
noun
The flat plate which forms the top of the furnace or firebox of an internally fired steam boiler.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
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