air drill

noun

The ordinary compressed air drill (which may, for surface work, be operated also by steam) may be taken as an illustration.

The bang, bang of the compressed air drill was getting louder and louder as the moments passed.

The more recent forms perform the same amount of work as the air drill, with a consumption of about one-tenth the power.

A compressed air drill was brought, a dolly-rod inserted, and then the dolmite was drilled to a thin shell.

The next day I went to work running an air-drill at four dollars a day.

April 19, 2024tortuous

[tawr-choo-uhs ]

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