英语词汇“position micrometer”的意思、释义、用法解释及翻译-春雷网

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词汇	position micrometer
释义	Definition of position micrometer in English: position micrometer noun rare An apparatus for measuring the position angle of one celestial object relative to another, containing a thread or wire mounted at the common focus of the objective lens and eyepiece of a telescope, which can be rotated in a plane perpendicular to the axis of the telescope; an apparatus similarly used with a microscope. Origin Mid 19th century; earliest use found in The Penny Cyclopaedia. Definition of position micrometer in US English: position micrometer noun rare An apparatus for measuring the position angle of one celestial object relative to another, containing a thread or wire mounted at the common focus of the objective lens and eyepiece of a telescope, which can be rotated in a plane perpendicular to the axis of the telescope; an apparatus similarly used with a microscope. Origin Mid 19th century; earliest use found in The Penny Cyclopaedia.
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