The information transmission system of frontal detection is a key technique for that the shield tunnel machine can operate with high quality, high speed and high efficiency safely.

盾构前向探测信息传输系统时保证盾构高质量、高速度、高效率和安全运行的关键技术。

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Miners watch as the drill machine 'Sissi' breaks through the rock on the final section of the Gotthard Tunnel.

打通山体的工人正在查看钻孔机器“茜茜公主”打穿圣哥达隧道最后一部分的岩石。

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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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Polly Ann and her son cheered when the machine was pulled from the tunnel.

VOA: special.2009.02.21

Remarkably you can see the machine move very slowly down the tunnel, a few inches at a time.

BBC: London's underground boring renaissance

Another option to the above is to use ankle weights wrapped around the wrist or forearm to eliminate stress on the carpal tunnel by avoiding any need for grasping a weight or machine handle.

CNN: What kind of strength work won't aggravate rotator cuff issue?