However, early investigations showed nanocrystalline materials, while having high strength and hardness, were also very brittle.

但是，早期的调查显示，尽管它具备高强度，高硬度，但是纳米钛合金材质也异常脆弱。

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The paste CR could not only improve the processibility of CR, but also that of NBR. It was more effective when used in NBR product with high hardness.

膏状氯丁橡胶不仅能改善氯丁橡胶的加工性能．也能改善丁腈橡胶的加工性能，尤其对高硬度的氯丁橡胶制品效果更佳。

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Although high hardness sapphire table mirror, only the diamond can cut it in theory, but does not mean that everything is all right, but also to prevent collision and fall break table mirror.

虽然蓝宝石表镜硬度高，理论上只有金刚石才能划伤它，但不代表就万事大吉，还要防止撞击和掉落震碎表镜。

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