An instrument for indicating the variation of a compass (variation, n. 5), consisting of two concentric circles, one fixed and the other turnable…
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| 单词 | θ205991 |
| 释义 | society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > compass > variation > instrument for ascertaining variation (1) rectifier1594 An instrument for indicating the variation of a compass (variation, n. 5), consisting of two concentric circles, one fixed and the other turnable… |
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