Poze : vehicul, design interior, domeniu public, lumixfz200, bridgecamera, trainsignals, pârghii, signalbox 2400x1807
Public Domain
Spune mulțumiri PxHere
Încorporați în articolul dvs. (de exemplu, Wordpress, Blogspot)
The first semaphore signals were controlled by levers situated at the signals. Some early signals protruded from the roof of the controlling signal box. Later, remote operation was effected by levers connected to the signal by single wires (UK), pairs of wires (Continental Europe), or pipes supported on rollers (US). The levers were grouped together in a building known as a "signal box" (UK & Australia) or "interlocking tower" (US). In the UK multiple signal wires were grouped together, and in station areas were commonly routed beneath platform faces just above rail level. The operation of a single signal wire would cause some of the adjacent wires to 'jangle', and this noise was one of the many characteristic sounds of railway travel until the gradual introduction of colour-light signals from the mid 20th century.
Liber de înaltă rezoluție fotografia vehicul, design interior, domeniu public, lumixfz200, bridgecamera, trainsignals, pârghii, signalbox
, luate DMC-FZ200 01/01 2017 Imaginea luată cu 6.0mm, f/4.0s, 10/1250s, ISO 160
Imaginea este eliberat gratuit a drepturilor de autor sub Creative Commons CC0.
Puteti descarca, modifica, distribui, și să le utilizeze drepturi de autor gratuite pentru orice doriți, chiar și în aplicații comerciale. De atribuire nu este necesară.











