Nearly 200 train movements each day are now made with greater safety and flexibility; features of interlocking machine, signals, field apparatus, power supply and air supply.
Indianapolis union station installs electro-pneumatic interlocking
Ry. Signaling
Railway Signaling ; 24 , n 8
1931
4 pages
6 Figs.
Aufsatz (Zeitschrift)
Englisch
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