- intermediate block signal
- 1) Техника: проходной сигнал2) Железнодорожный термин: проходной светофор, проходной сигнал автоблокировки
Универсальный англо-русский словарь. Академик.ру. 2011.
Универсальный англо-русский словарь. Академик.ру. 2011.
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