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。
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。
The invention discloses a flat strip-shaped drainage device which is applied to the operation implantation at the pars plana of a ciliary body to treat the refractory glaucoma.
一种适用于睫状体平坦部手术植入，治疗难治性青光眼的扁平条状引流器。
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