Classification opinions
… 2. Angles, perforated, prepared for use in the assembly of metal structures (racks, sets of shelves, furniture, stairs, … floors, ceilings or walls, for the purpose of securing, by means of special bolts, various types of equipment … boxes, etc. Adoption : 1967 … 7. Octagonal steel columns , measuring between 4 and 9 metres, presented unassembled with …