Aldrin relied on a felt-tip marker, since the non-conductive tip would close the contact without shorting it out, or causing a spark.

奥尔德林当时使用的是毡制粗头笔，它的尖头是不导电的，接触开关不会造成短路或引发火花。

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At present the Company holds CNC numerical control machine tool, EDM spark machine, milling machine, injection machine, and oil injection non-dust workshop and other advanced manufacture equipments.

公司目前拥有CNC数控机床、EDM火花机、铣床、注塑机、喷油无尘车间等各种先进生产设备。

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As the driver of the micro multi-rotor craft, the micro BLDC motor was of simple structure, easy fabrication, non commutation spark and so on.

作为多旋翼微直升机的驱动器，微型无刷直流电动机具有结构简单、制造方便、无换向火花等特点。

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But if non-eurozone investors decide to pull the three trillion euros in sovereign, corporate debt and equity investments from Italy and France - or even a part of it - that would spark a crisis on a scale likely to draw in the banks of non-crisis countries: Germany, France and the United Kingdom.

BBC: Euro talks: The last signal before the storm?