The green "metal free tool" sign indicates that this machine is used in a part of the process prior to the addition of copper circuits.

绿色的“非金属添加工具（metal free tool）”标志意味着硅晶圆必须得经过这台机器的处理以后，才能去添加铜质电路。

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A week with dry compressed air or a copper brush cleaning machine back condenser more than once.

每周需用干燥的压缩空气或铜刷清理机台背部冷凝器一次以上。

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The common method of enhancing the efficiency is given, such as decreasing the iron loss, copper loss and machine loss.

从降低电机的铁耗、铜耗和机械损耗着手，给出了提高电机效率的一般方法。

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For the Majorana experiment, physicists have made their own purified form of copper underground some of the purest on the planet and built an underground machine shop to make parts with the copper.

WSJ: Physicists Look for Dark Matter Underground

It's never happened before that we've fired a very large bullet that's made largely of copper and aluminum, the size of a washing machine, at a comet that's about--the comet's nucleus is about four or five miles across--to make a big crater.

NPR: NASA 'Deep Impact' Probe Targets Comet