Wow. That's some impressive construction technique. Maybe impressive isn't exactly the right word...

I did a little work for a contractor buddy doing a big renovation to a house built in 1947. It was slab on grade AND poured concrete walls. My part was removing a steel chimney liner (I'm a real good hand with a cutting torch) and helping to cut a new doorway. Turns out concrete was available when not much else was. Also turns out that there were some 'innovative' things done to normalize the remodel. 1" furring strips attached to all the walls to allow plumbing and electrical. Every room that he did shrunk a bit during the renovation :)

You won't recognize this, but any Americans will "It's not just a job, it's an adventure." A recruiting slogan from the US Army.