73347733
Jan 29, 1982
May 24, 1983
Wall-Like Structures Composed of Prefabricated Components of Concrete, Natural and Cast Stone and Plastics Materials, for Forming Noise Protection Walls or Sight Protection Walls, Retaining Walls or Planting Walls, Shore Walls, Garden Walls and Partition Walls; Molded Blocks of Concrete or Natural or Cast Stone for Horticulture and Landscaping
Nonmetallic Building Materials