Question: Refractoriness under load ( RUL ) is the most important property for the refractory bricks At the hearth bottom of the furnace on which stock

Refractoriness under load (RUL) is the most important property for the refractory bricks
At the hearth bottom of the furnace on which stock is placed
Used for furnace insulation
Used in the roof of the furnace
None of these

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