Bovedilla perfected for forged. (Machine-translation by Google Translate, not legally binding)

摘要

Improved vault for slab, characterized by comprising four identical ceramic pieces, which duly paired and found with two others similarly arranged, rotated ninety degrees, and so that they coincide the recesses provided in them constitute a parallelepiped piece shaping the cassette. (Machine-translation by Google Translate, not legally binding)