Horseshoe nail holes e tunnelling shield: o que têm em comum

1. Passo 1. Horseshoe nail holes — faz parte de — Horseshoe. Horseshoe nails fix the shoe.
2. Passo 2. Horseshoe — utiliza — Nail. It is nailed on.
3. Passo 3. Nail — utiliza — Wedge. The point of a nail pushes the wood apart.
4. Passo 4. Wedge — é utilizado em — Cinzel. The cutting edge is a wedge.
5. Passo 5. Cinzel — é utilizado em — Tunnel. Hezekiah’s Tunnel was cut by hand with chisels.
6. Passo 6. Tunnel — utiliza — Tunnelling shield. Shield tunnelling.

Abrir Evothings