High-quality scraping makes it possible to obtain a surface with an unevenness of the order of a few microns, the temperature of this machine reached more than 1200°C.
Styria is a federal state in the southeast of Austria. The capital and largest city is Graz.
Underground caves and corridors run through eastern Styria. But only a part of this underground complex of tunnels is known.
“We slipped in as kids and explored those corridors,” recalls entrepreneur Hermann Retter.
In recent years, more than 800 tunnel systems have been explored and scientifically documented, with a total length of eight kilometers.
“We have more than eight kilometers of pedestrian corridors throughout northeastern Styria – in the region of Forau, Pöllau and Stubenberg,” says historian Heinrich Kusch. It is not known what these objects were built for....<<<Read More>>>...
