Chemical compounds made binary elements are main body of refractory materials.
由两种元素生成的化合物是耐火材料的主体。
2
Being as two layer refractory lining on valve plate and valve body, light mullite and phosphate corundum refractory castables are taken as heat isolation and heat resisting layers respectively.
阀板、阀体的耐火衬里隔热层采用莫来石轻质耐火浇注料、耐热层采用磷酸刚玉质耐火浇注料，进行两层浇注。
3
The internal formation causes of chronic and refractory skin ulcer are deficiency of body energy.