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单词 ultra-micrometer
释义

> as lemmas

ultra-micrometer
5. Denoting instruments adapted for very minute measurements, observations, etc., as ultra-micrometer. See also ultramicroscope n.
ΚΠ
1928 Daily Express 22 June 6 Such instruments as the seismograph, ultra-micrometer, and torsion balance.
extracted from ultra-prefix
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