| 单词 |
crossbar micrometer |
| 释义 |
crossbar micrometer crossbar micrometer[′krȯs‚bär mī′kräm·əd·ər] (engineering) An instrument consisting of two bars mounted perpendicular to each other in the focal plane of a telescope, and inclined to the east-west path of stars by 45°; used to measure differences in right ascension and declination of celestial objects. |
| 随便看 |
- january 11, 2022
- january 11, 2023
- january 11th
- january 12
- january 1, 2000
- january 1, 2011
- january 1, 2012
- january 1, 2013
- january 1, 2014
- january 1, 2015
- january 1, 2016
- january 1, 2017
- january 1, 2018
- january 1, 2019
- january 1, 2020
- january 1, 2021
- january 1, 2022
- january 1, 2023
- january 12, 2011
- january 12, 2012
- january 12, 2013
- january 12, 2014
- january 12, 2015
- january 12, 2016
- january 12, 2017
|