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stadiometer
A compass is mainly used to draw perfect circles, but it can also be used to draw arcs of different sizes.
A stump is a paqinters' tool which has been used for centuries. It is defined thus:A short, pointed roll of leather or paper or wad of rubber for rubbing on a charcoal or pencil drawing to shade or soften it.
= Define the term map as used in engineering drawing?" =
The device used for measuring earthquakes is called a seismometer.