"signal tower"@en-us . "signal box"^^ . . . "0"^^ . . . . . "0"^^ . "signal box"@en-us . "104056143"@en-us . . "103336904"@en-us . . . "104217546"^^ . "a building from which signals are sent to control the movements of railway trains"@en-us . "04217546-n"^^ . .