Maximum drilling diameter 16mm?

最大钻孔直径16 mm ？

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The effect and accuracy of using the apparent resistivity logging curve to identify permafrost and its influencing factors, such as soil properties, ice content and drilling diameter are discussed.

初步探讨了利用视电阻率电位测井曲线，划分多年冻结层的效果及精度与冻结层岩性、含冰量和井径等因素的关系。

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They create a series of pores ranging from 5 to 25 nm in diameter by placing flakes of graphene over a silicon nitride membrane and drilling nanosized holes in the graphene using an electron beam.

通过将石墨烯薄片放置在一个氮化硅薄膜上，并用电子束在石墨烯上打出纳米尺度的孔，他们制作出了一系列从5到25nm直径的孔。

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It is currently drilling a 17.5-inch diameter hole -- smaller than the 28 inches required to rescue the miners -- in an effort to realign after veering off course over the weekend.

CNN: STORY HIGHLIGHTS

Drilling a 2 or 3 foot hole can be done with normal equipment, while drilling a ten, fifty, or one hundred foot diameter vertical hole would require an entirely new invention.

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The ship must stay perfectly still while drilling and does so using six thrusters with 15-foot-diameter propellers that can rotate 360 degrees.

FORBES: On The Cover/Top Stories