The air screw drill tool was power equipment which was designed for air drilling.

空气螺杆钻具是专为空气钻井而设计的动力装置。

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The performance difference between air crew drill and mud motor was analyzed under the air drilling condition.

对比分析了空气螺杆钻具与泥浆马达在空气钻井井况下的性能差异。

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The sequence of excavation for the shaft of diversion system at Pushihe storage power station is to excavate the pioneer well used by back well boring machine, then by hand air drill to expand it.

蒲石河抽水蓄能电站引水系统中的竖井开挖，拟采用反井钻机进行导井开挖，人工手风钻钻孔扩挖的方式施工。

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To determine whether a deposit has enough of a mineral to merit mining, companies use air-based geological mapping and drill for core samples.

WSJ: Exhausting the Earth's Resources? Not So Fast

These dry, 15-to-20-second statements are as fun to listen to as the dentist's drill, and make the air only under the strictest of rules: There can be no mention of products, and no appeal to buy anything.

FORBES: Public Radio Goes Begging

They also noted the deployment of Russia's most advanced S-400 air defence system in Belarus and a parallel drill conducted by the Strategic Rocket Forces, the guardians of the Kremlin's nuclear arsenal.

ECONOMIST: NATO and Russia