首页 > Term: abac
abac
A nomograph for determining the angle, at a common origin, between the bearing of a great circle and the bearing of a rhumb line to a point. It provides the difference (t minus T) between the two bearings.
- 词性: noun
- 行业/领域: 地球科学
- 类别 绘图科学
- Company: American Congress on Surveying & Mapping
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- Sean64
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