With the advantage of compact structure, stable motion and no blind rock drilling area, double triangle boom is used in rocking drilling robot.

双三角钻臂具有结构紧凑、运行平稳、凿岩无盲区等优点，被凿岩机器人所采用。

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Drilling in gravel stratum is one of present difficulties in drilling area with low drilling speed, short service life of bit and high drilling cost.

卵砾石地层钻进是钻探的难题之一，不仅钻进速度低，钻头的使用寿命短，而且钻探成本高。

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The Russians, who control far more prospective drilling area in the Arctic Ocean than the United States and Canada combined, take a far different view.

俄罗斯人采取完全不同的看法，他们在北冰洋地区控制的潜在的可开采面积要比美国和加拿大合起来还要大的多。

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One day,a salesman came to the work area with a new drilling machine powered by steam.

VOA: special.2010.09.04

Earlier in the week, drilling had to be stopped due to geological faults in the drilling area.

CNN: New drill arrives in Chile with great fanfare

Mr. SAWLIS: With them being strong flyers, I've got a huge bullet to try and figure out exactly is it coming from this particular mining area or not or this drilling area or not.

NPR: Unusual Breed of Mosquitoes Hits Dallas

When they get back, the space vehicle will hopefully have provided enough data to pinpoint a potential drilling area so it can drill, collect and analyze rock samples using onboard tools -- a feat never-before attempted on Mars.

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