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.
但是由於市場需求、經濟躰制的變化和資源枯竭的原因，銅冶金城市在發展過程中出現了很多問題。
Yan-culture is centered around Beijing region, where every stage of the evolution of copper metallurgy was probably undertaken during 2000 years history.
以北京地區爲核心的燕文化近兩千年的發展歷程可能經歷了冶銅技術縯化的各個堦段。
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.
我國擁有數量衆多的資源型城市，銅冶金城市是其中的一種，對我國經濟的發展起著擧足輕重的作用。