Hakuluettelo:
Käännös:
ball signal (suomeksi)
- Määritelmät:
- (lb, en, historical) A kind of mechanical signal used on early American railroads, consisting of wooden balls, painted various colors, that were hoisted up and down a pole using a rope and pulley.
Viimeisimmät haut: ball signal, close quarters, flight ceiling, heather-bell, demilitarisoiminen, frumentary