De quoi est fait tunnel
An underground structure (Eupalinos).
- Tunnel lining — a pour partie. A lining of concrete or segments.
- Tunnel portal — a pour partie. Tunnel portals.
- Street light — a pour partie. Lighting.
- Tunnelling shield — utilise. Shield tunnelling.
- Dynamite — utilise. Drilling and blasting.
- Rock drill — utilise. Driving the Mont Cenis tunnel.
- Ciseau — utilise. Hezekiah’s Tunnel was cut by hand with chisels.
- Mine ventilation — utilise. Ventilation.