(signalmen)
A ~ is a person whose job is to control the signals on a particular section of a railway.
N-COUNT
(signalmen)
A ~ is a person whose job is to control the signals on a particular section of a railway.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012