Lub sijhawm hluav taws kub ntawm chav kawm B steel qhov rooj hluav taws yuav tsum tsis pub tsawg dua 1.0 teev, thiab cov khoom siv kho vajtse siv rau ntawm qhov rooj hluav taws yuav tsum siv cov khoom siv hluav taws xob refractory. Feem ntau, qib no ntawm qhov hluav taws kub feem ntau yog siv rau tsev neeg kho kom zoo nkauj qhov rooj.

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