Define the following
Screw Gauge
Pitc
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It is used to measure very small length. It it has two scales namely main scale and circular scale.
It is the which is the distance on main scale which is revealed after one rotation of circular scale
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Here's your Answer...
An instrument used for measuring accurately the diameter of a thin wire or the thickness of a sheet of metal.
A pitch is quality of sound told by the rate of vibrations...
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