calipers
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Vernier calipers
Source: Wikipedia
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Devices used in measuring. Simple calipers comprise a pair of metal legs,
pivoted about a shared screw at one end, the other ends being turned inward
(for outer dimensions) or outward (for inner dimensions). They are usually
used in conjunction with a ruler. Vernier calipers resemble
a sliding wrench and incorporate a vernier
scale. Related category
INSTRUMENTATION
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