Grade and label raw materials or finished products according to size, thickness, composition or other classification standards.
根据大小，厚度，成分或其他分类标准，定级和标签原料或成品。
2
The limitation of geological conditions is important to model a deposit. The geological statistics methods are effective for ore grade estimation and reserve classification.
地质控制条件限制是矿床建模的重要手段， 地质统计学方法是矿块品位估计以及储量分级等的有效方法。
3
The classification, grade, numbering and administration of reference materials in China is explained.