Front-mounted pedal crank e electrical telegraph: o que têm em comum

1. Passo 1. Front-mounted pedal crank — faz parte de — Recumbent bicycle. Pedals at the front.
2. Passo 2. Recumbent bicycle — tem como parte — Roller chain. The drive is by chain.
3. Passo 3. Roller chain — faz parte de — Roller coaster. A chain lift.
4. Passo 4. Roller coaster — utiliza — Railway track. Rails.
5. Passo 5. Railway track — inspirou — Time zones. Introduced because of railway timetables.
6. Passo 6. Time zones — utiliza — Electrical telegraph. Synchronizing time by telegraph.

Abrir Evothings