材料种类
category───n.种类，分类；[数]范畴
category 6───类别6
material───n.材料；用具；（有指明特征的）人才；素材；曲目；布料；adj.物质的；身体需要的；和推理内容有关的；重要的；（证据或事实）决定性的；客观存在的；物欲的；n.(Material)（意、美）妈特力娅丽（人名）
category management───品类管理；类别管理
obligatory category───强制性类别
syntactic category───句法范畴
category funimation───类别功能
fibred category───纤维类别
conjoined category───连缀范畴
Food and Drug Administration requires that natural flavors come from a natural material, but that's a broad category.───食品和药物管理局要求天然风味需来自天然的材料，但它是个很广义的分类。
However, the category of traditional encyclopedias and reference material has changed.───然而，传统百科全书和参考材料的范畴业已改变。
Moreover, he said, none of the documents reviewed so far carries a classification level above "secret" - the lowest category of intelligence material in terms of sensitivity.───此外，他还提到此次披露的所有文件最高密级都没有超过“秘密”——这是依据情报敏感性的分类体系中的最低等级。
aerated concrete can according to raw material category, quality, main equipment technological characteristic, take different processes.───加气混凝土可以根据原材料类别、品质、主要设备的工艺特性等，采取不同的工艺进行生产。
In the ISO9000 system belongs to the process of material category.───在ISO9000体系中属于流程性材料的范畴。
With the aid of: Chooses the adhesive tape to have to provide the material viscosity sand the material category with the aircraft type───借助：选择胶带用机种必须提供材料粘度及材料种类