首页 > Term: backstaff
backstaff
An instrument formerly used for taking the altitude of the heavenly bodies, but now superseded by the quadrant and sextant; -- so called because the observer turned his back to the body observed.
- 词性: noun
- 行业/领域: 语言
- 类别 字典
- Company: MICRA Inc.
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创建者
- spencer12
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(Germany)