train detection। dc track। dc track circuit failure #snt #railwaysignalling#signals@kumarsir2612

train detection। dc track dc track circuit failure dc track circuit maintenance DC track CKT in railway Hindi dc track circuit failure parameter dc track circuit dc track circuit in railway dc track train detection system train detection train detection kaise hota hai train detection kaise kaam karta hai tws point machine installation tws point machine in railway irs point machine railway train signalling system in india signal maintainer training signal technician training in railway #snt #railwaysignalling #snt #signals‎ #pway #signalling #signalling #signals_systems @kumarsir2612