With the exception of heavy copper, the best all-purpose material, in our opinion, is heavy, enameled cast iron.

除了厚实的铜锅之外，我们觉得最棒的万能材料是厚实的搪瓷铸铁。

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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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The leads to the broken switch were just two heavy-gauge copper wires.

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