Gea's porphyry
Drains are made from very thick slabs by sawing, shaping and subsequent hammering or flaming
The drains are turned into overflow drains with the addition of slits for the discharge of rainwater.
Drains are made from very thick slabs by sawing, shaping and subsequent hammering or flaming
The drains are turned into overflow drains with the addition of slits for the discharge of rainwater.