73011873
Jan 25, 1974
Oct 18, 1977
PORTABLE STRUCTURAL ELEMENTS-NAMELY, HOUSES, HALLS, ELEMENTS OF HOUSES AND CELLS, PREFABRICATED IN ROUGH CONDITION AND INSTALLED IN SITU, MADE FROM PLASTIC MATERIALS AND/OR WITH THE USE OF PLASTIC MATERIALS, WOOD MATERIALS AND REINFORCING FIBERS; STRUCTURAL ELEMENTS TO BE USED ABOVE THE GROUND OR BELOW THE GROUND
Nonmetallic Building Materials