Centre punch

Webster's Dictionary of the English Language

·add. ·- A punch for punching holes in sheet metal, having a small conical center to insure correct locating.

II. Centre punch ·add. ·- A punch for making indentations or dots in a piece of work, as for suspension between lathe centers, ·etc.

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  • centre of displacement, of immersion, and of buoyancy, of cavity

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