4 ms·
Funny that they had to freeze the ground to dig it, as it is one of the hottest line in Paris (at least 20 years ago).
by llsf 2y ago
Funny that they had to freeze the ground to dig it, as it is one of the hottest line in Paris (at least 20 years ago).
- s1artibartfast 2y agoMy understanding is that the freezing is normally about stopping water intrusion long enough to drill and place concrete