Bamboo in the Northwest due to the lack of rare materials.

竹编在西北因原料缺乏较少见.

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Basically, it is made of carbon steel , normalized and tempered steel , rare materials, etc.

连续油管用材主要有碳钢 、 调质钢和稀有材料等.

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These tools and weapons reflect power relations through their appropriation of advanced techniques and rare materials.

这些器具通过占有最高超的技术和珍贵的材料,体现出权力的力量.

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