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containing
双向自动闭塞
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in specified order only
Subject
Chinese
English
commun., railw.
双向自动闭塞
double-direction automatic block
tech.
双向自动闭塞
double direction automatic block
tech.
双向自动闭塞
号志
automatic block signal in both directions
railw.
双向运行自动闭塞
double-direction automatic block
tech.
双向运行自动闭塞【铁】
double direction automatic block
tech.
双向运行自动闭塞【铁】
automatic block with double direction running
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