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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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.

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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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