Hierapolis sawmill e tunnelling shield: o que têm em comum

1. Passo 1. Hierapolis sawmill — tem como parte — Water wheel. Driven by water.
2. Passo 2. Water wheel — faz parte de — Gunpowder mill. The drive.
3. Passo 3. Gunpowder mill — utiliza — Gunpowder. Production.
4. Passo 4. Gunpowder — evoluiu para — Dinamite. A replacement for gunpowder in mining.
5. Passo 5. Dinamite — funciona como — Tunnelling shield. Two ways of driving tunnels — mechanical and explosive.

Abrir Evothings