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单词
occulting bar
释义
occulting bar
occulting bar
[
ə′kəlt·iŋ ‚bär
]
(astronomy)
A bar placed in the focal plane of a telescope eyepiece to cover part of the field of view, usually to cover a bright object in order to permit observation of a nearby faint object.
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更新时间:2025/6/6 0:42:00