It consists of a metal shell, crystal fused magnesia for insulation, built - in electric wire fever.

它由金属作外壳, 结晶电熔镁砂作绝缘体, 内 置 电热丝发热.

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The results show that fused magnesia - zirconia material has better slag penetra - tion resistance than magnesia material.

结果表明:镁锆合成料比镁质材料具有更好的抗渣渗透性.

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