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Vertical Circle

[天] 地平经圈；垂直圈仪

1、竖直度盘

教学内容：一、竖直度盘(vertical circle)的构造二、竖直角(vertical angle)的计算公式三、竖盘指标差(index error of vertical circle) 1、定义 2、计算公式（1）指标...

2、等高圈

... vertical axis垂直轴 vertical circle等高圈 vertical component垂直分量 ...

vertical l circle地平经圈

vertical revolving circle立运仪

vertical l circle level垂直度盘水准器

vertical-circle lefvel tube垂直度盘水准管

photographic vertical circle[天] 照相垂直环

full vertical circle全圆刻度垂直度盘

the prime vertical circle正在翻译;主要的垂直圆

principal vertical circle观测者子午线

机械工程

天文学

环境科学技术

地球科学

n.a great circle on the celestial sphere passing through the zenith and perpendicular to the horizon

1.
N（名词） a great circle on the celestial sphere passing through the zenith and perpendicular to the horizon 地平经圈 [astronomy]

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