保护渣 meaning in English

abdeckschlack
covering slag
protecting slag

Effect of compositions of mold flux on crystalline phase
保护渣成分对结晶矿相的影响
Study on mold flux of thin slab continuous casting
薄板坯连铸保护渣研究
Method of the test for viscosity of continuous casting mold powder
连铸保护渣粘度试验方法
Method of the test for bulk density of continuous casting mold powder
连铸保护渣堆积密度试验方法
Method of the test for melting temperature of continuous casting mold powder
连铸保护渣溶化温度试验方法

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