This material is as hard that it can be used for cutting steel.
这种材料很硬，可以用来削切钢材。（形容词：硬的）
The way of cutting hard brittle material in a plastic state is classified.
对塑性状态下切削硬脆材料的方法进行了归纳和分类。
As a new type tool material, the excellent capabilities of silicon nitride ceramics cutting tools ravel out many cutting problems of super hard materials.
氮化硅陶瓷是一种新型刀具材料，其优良的切削性能解决了超硬材料的加工难题。
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