Lighthouse tower e cinzel: o que têm em comum

1. Passo 1. Lighthouse tower — faz parte de — Lighthouse. A tall base for the light source.
2. Passo 2. Lighthouse — tem como parte — Rotation mechanism. It rotates the optics, setting the flash pattern.
3. Passo 3. Rotation mechanism — faz parte de — Rock drill. It rotates the rod between blows.
4. Passo 4. Rock drill — é utilizado em — Tunnel. Driving the Mont Cenis tunnel.
5. Passo 5. Tunnel — utiliza — Cinzel. Hezekiah’s Tunnel was cut by hand with chisels.

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