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单词
block system
释义
WordReference Random House Unabridged Dictionary of American English © 2024
block
′
sys′tem,
[
Railroads.
]
Rail Transport
a series of consecutive blocks. Cf.
block
(def. 22).
Rail Transport
a system of blocks and block signals for controlling train movements.
1860–65
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更新时间:2025/7/23 16:39:09