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.
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.