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to phrases
double-track automatic block system
commun., railw.
双线自动闭塞
double track automatic block system
railw.
双线自动闭塞
tech.
复线自动闭塞系统
;
双线自动闭塞系统
double-track automatic block system
:
4 phrases
in 3 subjects
Communications
2
Rail transport
1
Technology
1
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