![There’s a first layer made of steel\Nand a second one of reinforced concrete.
There’s a first layer made of steel\Nand a second one of reinforced concrete.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
There’s a first layer made of steel
and a second one of reinforced CONCRETE.
Money Heist Season 1, Episode 8
![The structure is covered\Nwith concrete walls
The structure is covered\Nwith concrete walls](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
The structure is covered
with CONCRETE walls
Money Heist Season 3, Episode 3
![80 centimetres of reinforced concrete.
80 centimetres of reinforced concrete.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
80 centimetres of reinforced CONCRETE.
Money Heist Season 1, Episode 8