Some important indexes, such as "copper ore index", "copper resource efficiency" and "copper scrap index", etc originated from copper-flow diagram were given and analyzed.

由铜流图得到了铜工业的矿石指数、铜资源效率和废铜指数等重要指标，并对其进行了分析。

youdao

Some important indexes, such as "copper ore index", "copper resource efficiency" and "copper scrap index", etc originated from copper-flow diagram were given and analyzed.

由铜流图得到了铜工业的矿石指数、铜资源效率和废铜指数等重要指标，并对其进行了分析。

youdao