1) Electric tool
Found on
https://www.crosswordclues.com/clue/hammer-drill
A hammer drill, also known as a `rotary hammer`, `roto-drill` or `hammering drill`, (see also rotary drill) is a rotary drill with a hammering action. It is also the act of one person holding a regular drill while the other person `smacks` the back of the drill with a mallet, or light metal hammer. The hammering action provides a short, ra...
Found on
http://en.wikipedia.org/wiki/Hammer_drill
(from the article `drilling machinery`) Percussive drilling is slower than rotary drilling but has a number of special applications, such as for shallow holes. In percussive drilling, blows ... Rock drills are used for mining and rock excavation. An example of such a pneumatic tool is the hammer drill, or percussion hammer, which is com...
Found on
http://www.britannica.com/eb/a-z/h/11
No exact match found.
