out-layer Mg-Al spinel

• 表层尖晶石

out-layer Mg-Al spinel的用法和样例：

例句

1. This is a blue colour stain with a spinel structure, widely used in glazes.
   这浅蓝色料具有尖晶石结构，广泛适用于不釉中。
2. Spinel containing refractories are widely used in metallurgical industry.
   含尖晶石的耐火材料广泛应用于冶金行业。