A large, heavy mechanical drill driven by compressed air, used for breaking up a hard surface such as a road.
- A workman below was using a pneumatic drill to break up some concrete which had already been laid.
- Television footage showed yellow-suited rescuers with headlights using their hands and small pneumatic drills to break through concrete floor slabs and pulling victims on stretchers from collapsed homes and apartments
- These inventions, together with the diamond drilling crown and the pneumatic drill, drastically reduced the cost of blasting rock, drilling tunnels, building canals and many other forms of construction work.
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