Rebar e electrical telegraph: o que têm em comum

1. Passo 1. Rebar — faz parte de — Reinforced concrete. Reinforcement.
2. Passo 2. Reinforced concrete — é material para — Sleeper. Reinforced concrete sleepers.
3. Passo 3. Sleeper — faz parte de — Railway track. Sleepers.
4. Passo 4. Railway track — inspirou — Time zones. Introduced because of railway timetables.
5. Passo 5. Time zones — utiliza — Electrical telegraph. Synchronizing time by telegraph.

Abrir Evothings