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railway signalling system

system with signals used to control railway traffic

en-GB/ˈɹeɪlweɪ ˈsɪɡnəlɪŋ ˈsɪstəm/
en-US/ˈɹeɪlˌweɪ ˈsɪɡnəlɪŋ ˈsɪstəm/

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technical system