First thing you want to do is drill a pilot hole in the right location.

第一件事，你想要做的就是钻一个先导孔在正确的位置。

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Application of inverse well drill will permit quick and safe excavation of pilot shaft.

应用反井钻机开挖导井可达到快速安全的效果。

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The drill would use that hole as a pilot and widen the diameter to about 28 inches, which officials have said is wide enough for the miners to be hoisted through.

CNN: Drilling to reach Chile miners yet to begin

The drill would use one of the three bore holes already made as a pilot and widen the diameter to about 28 inches, which officials have said is wide enough for the miners to be hoisted through.

CNN: New video shows trapped Chilean miners in good spirits