There is rich ideology of "He" in the field of ancient China metallurgy technology.

在中国古代冶金技术领域，也蕴涵着丰富的“和（合）”思想。

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The structure and properties of the cutter produced by DC-plasma gradient metallurgy technology were investigated.

对等离子梯度冶金成型技术制备的截齿刀头组织结构与性能进行了分析。

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The discussion mainly aims at the precision of straight gear products which are produced by powder metallurgy technology.

主要针对粉末冶金制造的直齿轮产品进行精度之探讨。

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To be sure, the discovery of metallurgy was a huge leap forward in technology, but stone tools are sophisticated in design in their own right.

FORBES: The First Human Technology