copper metallurgy

常见例句

Because of economic system and market demand changing, lots of problems have appeared in the developing process of copper metallurgy city.
但是由于市场需求、经济体制的变化和资源枯竭的原因，铜冶金城市在发展过程中出现了很多问题。
Yan-culture is centered around Beijing region, where every stage of the evolution of copper metallurgy was probably undertaken during 2000 years history.
以北京地区为核心的燕文化近两千年的发展历程可能经历了冶铜技术演化的各个阶段。
Copper metallurgy city is one kind of a large number of resource-based cities that China owns. They have played an important role in economic development of our country.
我国拥有数量众多的资源型城市，铜冶金城市是其中的一种，对我国经济的发展起着举足轻重的作用。