One superconducting device current lead of the invention is made of copper bar material with insulating layer covered on its surface, and the copper bar material is formed solenoid.

本发明的一种超导装置电流引线，由表面覆盖绝缘层的铜棒材组成，所述铜棒材构成螺线管。

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Putting more than half a million road miles on development versions of the Spark EV enabled engineers to make the performance of the electric motor the best it could be by using a bar wound copper stator and unique rotor configuration.

ENGADGET: Chevy Spark EV rated most efficient retail car with 82-mile range, 119 MPGe

Copper prices are still in a four-week-old downtrend on the daily bar chart.

FORBES: Comex Gold, Silver End Firmer on Short Covering as U.S. Dollar Index Weaker, Crude Oil Higher