When metallic material deformation forereach its plastic limit , it will divide completely. Then the interatomic force is damaged.

断裂-金属材料在变形超过其塑性极限—完全分开.原子间结合力遭受破坏.

The cryoprobe soaked in liquid nitrogen is a new cryother- apic instrument with metallic material as its cold storage.

浸冷式液氮冷刀,系用金属材料为储冷装置的新式冷冻治疗器械。

Using nano-technology in surface, we are able to make metallic materials not only have surface nanocrystallization, but also macrocrystal basal body.

金属材料可以利用表面纳米化技术，制备出具有纳米晶相结构的表层，而基体仍然保持原有的粗晶状态。