Copper wiring goes in one heap, aluminium foil in another.

铜线一堆，铝片另一堆。

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A number of scientists, yet, are focussing on the improvement of graphene growth over transition metal substrate such as copper foil substrate.

但一些科学家仍致力于改进借助过渡金属基质的石墨烯生产方法，比如说借助铜箔基板。

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Equivalent heat conductivity of PWB is related to the thickness of PWB, the residual ratio of copper foil and the thickness of copper foil.

PWB的等效导热系数与PWB的总厚度、 铜箔剩余率及铜箔厚度有关，设计时需考虑相关因素。

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This is a piece of copper foil 20cm square that has 696 rings, a portion of which is reproduced above.

ECONOMIST: The search for alien life

In order that the foil does not fall apart, each transparent ring is actually a series of curved slots in the copper rather than a continuous gap.

ECONOMIST: The search for alien life