english: And looking at tunneling technology, it turns out that in order to make a tunnel, you have to -- In order to seal against the water table, you've got to typically design a tunnel wall to be good to about five or six atmospheres.
non_english: Posmatrajući tehnologiju kopanja tunela, ispada da, kako biste napravili tunel, morate - Kako biste blokirali podzemne vode, obično morate da dizajnirate zid tunela da izdrži pritisak od oko pet ili šest atmosfera.