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gridiron pendulum
释义
WordReference Random House Unabridged Dictionary of American English © 2024
grid
′
iron pen′dulum,
Time
a clock pendulum having, as part of its shaft, an arrangement of brass and steel rods having different coefficients of expansion, such that the pendulum has the same length at any temperature.
1745–55
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更新时间:2026/7/3 22:28:51