automatic block signaling

railroad communications system

en-GB/ˌɔːtəˈmætɪk ˈblɒk sɪɡnəlɪŋ/
en-US/ˌɑdəˈmædɪk ˈblɑk ˈsɪɡnəlɪŋ/

Катэгорыі:

railway signalling systemsignalling block system