在第四章，对理想材料结构热锻模具的制造方法进行可行性研究讨论。
The feasibility study of manufacture method for "Ideal Material Structure Hot Forging Die" is expressed.
镁合金是最轻质的金属结构材料，是实现军事装备轻量化和提高军事装备各项性能的理想材料。
Magnesium alloys are the lightest structural metallic materials, which can be used to reduce the weight of military equipments and improve their performance.
用时域有限差分方法计算了一组具有相似几何结构且包含理想金属材料的准分形光子晶体的能带。
The photonic band of a set of quasi_fractal photonic crystals, which have similar structure and include idealized metal, is computed by finite_difference time_domain method.
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