relay interlocking

railway interlocking that uses relays

en-US/ˈɹiˌleɪ ˈɪntɚˌlɑkɪŋ/
en-GB/ɹɪˈleɪ ˌɪntəˈlɒkɪŋ/

श्रेणियाँ:

signalling control