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pneumatic drill
(redirected from jackhammer)

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pneumatic drill

Drill operated by compressed air, used in mining and tunnelling, for drilling shot holes (for explosives), and in road repairs for breaking up pavements. It contains an air-operated piston that delivers hammer blows to the drill bit many times a second. The French engineer Germain Sommeiller (1815–1871) developed the pneumatic drill in 1861 for tunnelling in the Alps.



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Ward also is concerned about the added burden of costs of new technology the plan will require, additional equipment, such as sound mufflers for jackhammers and backhoes, and thicker construction fences.
Noise debate expected to get rowdy by Wolffe, Danielle / Real Estate Weekly
During the mudslinging run-up to the midterm election, reports revealed that Boyias--the CEO of Marina Pacific Distributors, which produces hard-core gay-porn flicks like Wet Palms and Jackhammer is a frequent contributor to the Republican National Committee.
Snap judgment: gay-porn king Nicholas T. Boyias is no friend to the ... by The Advocate (The national gay & lesbian newsmagazine)
JACKHAMMERS never come in with their hammers up and running; they operate undercover, breaking up what you believed were solid relationships and effectively destroying a school community's culture and climate with just a few jabs.
Parents on power trips by Ezarik, Melissa / District Administration
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