Gun drill is a kind of extensively used hole-machining tool.

枪钻是一种广泛应用的孔加工刀具。

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There are two kinds of gun drills, namely, the center-cut gun drill used for drilling blind holes and the trepanning drill.

深孔钻有两种类型，即用于钻盲孔的中心切削深孔钻和套孔钻。

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This paper describes the mathematical model derivation of gun drill point with planar flanks, for given sets of design parameters.

本文根据选定的枪钻设计参数，导出平面型后刀面枪钻钻尖的数学模型。

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The gun and drill were used in two interrogation sessions against Abd al-Rahim al-Nashiri, according to a source familiar with the report's contents.

CNN: Top prosecutor orders probe into interrogations; Obama shifts onus

In other incidents involving Mr Nashiri, he was allegedly threatened with an unloaded gun and had a power drill held near him which was repeatedly turned on and off.

BBC: Guantanamo Bay detainees in 2002

Friel also pleaded guilty to a charge of possessing for a terrorist purpose an eye shield and visor, a mini rotary tool kit, drill bits, a heat gun, various tools and electrical material, berets, worksuits, gloves, plastic boxes, Bentley electronic timer instructions, batteries and duct tape on the same date.

BBC: Derry man Anthony Friel admits pipe bomb charges