Over the years, it's been called a weather-control machine, a superweapon and the ultimate underground spying machine. As if creating artificial aurora borealis wasn't freaky enough.

多年来，人们一直称之为气候控制机器、超级武器、终极地下间谍设备，殊不知人工创造极光的实验本身就充满荒诞不经的味道。

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Exactly where such a machine would be built is a moot point-though it would certainly go in an underground tunnel, inorder to reduce the effect of vibrations.

这种机器设备将在何处建造还将进一步地进行会议讨论——尽管它可被置于地下隧道来减弱震动地影响。

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Pneumatic drifter is a new short distance and small bore underground construction machine.

气动穿孔机是一种新型短距离、小直径地下施工机械。

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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.

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Examples include: high accuracy machine tools, deep underground tunneling machines, telecommunications equipment, underwater surveillance gear, sophisticated computers, manufacturing equipment associated with microelectronics, advanced composites and super-alloys.

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Key technologies transferred by or through Germany to the Soviet Union include: high accuracy machine tools, deep underground tunneling machines, telecommunications equipment, underwater sensors, sophisticated computers and manufacturing equipment associated with microelectronics, advanced composites and superalloys.

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