A part of a mathematical, astronomical, or surveying instrument, which slides backwards and forwards.
| 单词 | θ7440 |
| 释义 | the world > the earth > earth sciences > geography > map-making > surveying > [noun] > surveying instruments > part of a surveying instrument > movable ruler (1) cursor1594 A part of a mathematical, astronomical, or surveying instrument, which slides backwards and forwards. |
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