… backing, for mosaics or similar decorative purposes; leaded lights and the like; multicellular or foam glass in blocks, panels, plates, …
Explanatory notes
… backing, for mosaics or similar decorative purposes; leaded lights and the like; multicellular or foam glass in blocks, panels, plates, … usually in conjunction with concrete, for slabbing the lining walls of cellars, basements, underground corridors, …