Below, a photo of a woman recycling a piece of imported American scrap metal inside of an industrial-scale motor scrap recycling (and copper smelting) operation south of Shanghai.

下面是一个妇女的照片，她正在一家上海南部的工业汽车废物回收(和金属熔化)厂回收一件美国进口的废金属。

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Recent years' geological exploration has confirmed that the proved copper reserves in Dabaoshan copper(silver) polymetallic ore field has reached middle scale.

云南维西大宝山铜（银）多金属矿区通过近年的地质勘查，探明的铜资源量已达中型规模。

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Verified test with a copper sulphide ore was carried in laboratory scale.

利用某矿山的铜硫矿石进行了实验室验证试验。

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Its union with Freeport, it said, would benefit from strong global demand for copper, alongside a scarcity of large-scale copper development projects.

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However, torque then becomes a problem, requiring huge generators with heavy copper windings that may scale out in the 3-4 MW range.

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So is the scale of the logistical challenge of building one of the world's biggest copper mines in the middle of the desert.

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