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shadow pin
释义
WordReference Random House Unabridged Dictionary of American English © 2024
shad
′
ow pin′,
[
Navig.
]
Nautical, Naval Terms
a vertical pin set in an azimuth instrument or at the center of a compass card, indicating by the direction of its shadow the azimuth of the sun.
1890–95
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更新时间:2026/11/6 16:36:16