machines and complete plants for the manufacture of building materials, namely, porous artificial stone and elements of aerated concrete, lightweight concrete, and foam concrete, namely, raw material handling and mixing apparatus, cutting machines with cutting wires, tilting cranes, autoclaves, separating machines, unloading equipment, and replacement parts and fittings therefore; machines for the manufacture of building elements, namely, steel wire stretching, cutting, and welding machines, anti-corrosion installations, fixing devices, dry cutting machines, and replacement parts and fittings therefore

building materials, namely, artificial stones, porous artificial stones, aerated concrete, lightweight concrete, foam concrete,concrete and hollow bricks; transportable buildings and building elements made of aerated concrete, lightweight concrete, foam concrete, but not of metal; chimneys and parts thereof, and mortar